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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>UNITED STATES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Washington D.C. 20549</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>FORM 8-K</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>CURRENT REPORT</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>PURSUANT TO SECTION 13 OR 15(D) OF</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>THE SECURITIES EXCHANGE ACT OF 1934</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">Date of Report (Date of earliest event reported):<B>
January 18, 2012</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>MusclePharm Corporation</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">(Exact name of registrant as specified in its
charter)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font-family: Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 34%; line-height: 115%; font-size: 10pt; font-weight: bold; text-align: center">Nevada</TD>
    <TD STYLE="width: 33%; line-height: 115%; font-size: 10pt; font-weight: bold; text-align: center">000-53166</TD>
    <TD STYLE="width: 33%; line-height: 115%; font-size: 10pt; font-weight: bold; text-align: center">77-0664193</TD></TR>
<TR>
    <TD STYLE="vertical-align: bottom">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">(State or other jurisdiction</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">of incorporation)</P></TD>
    <TD STYLE="vertical-align: top; line-height: 115%; font-size: 10pt; text-align: center">(Commission File No.)</TD>
    <TD STYLE="vertical-align: bottom">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">(I.R.S. Employer</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">Identification Number)</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>4721 Ironton Street, Building A</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Denver, Colorado 90839</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">(Address of principal executive offices)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>(303) 396-6100</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">(Registrant&rsquo;s telephone number, including
area code)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">Check the appropriate box below if the Form
8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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    <TD STYLE="width: 24px; line-height: 115%; font-size: 10pt"><FONT STYLE="font-family: Wingdings 2">&#163;</FONT></TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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    <TD STYLE="width: 24px; line-height: 115%; font-size: 10pt"><FONT STYLE="font-family: Wingdings 2">&#163;</FONT></TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font-family: Times New Roman, Times, Serif">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 24px; line-height: 115%; font-size: 10pt"><FONT STYLE="font-family: Wingdings 2">&#163;</FONT></TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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<TR STYLE="vertical-align: top">
    <TD STYLE="width: 24px; line-height: 115%; font-size: 10pt"><FONT STYLE="font-family: Wingdings 2">&#163;</FONT></TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 10pt"><FONT STYLE="line-height: 115%">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><B>Item 5.03 Amendments to Articles of Incorporation
or Bylaws; Change in Fiscal Year.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><I>Amendment to Articles of Incorporation</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">On January 18, 2012, MusclePharm Corporation
(the &ldquo;Company&rdquo;) filed an amendment to the Company&rsquo;s articles of incorporation with the Secretary of State of
the State of Nevada to increase the Company&rsquo;s authorized common stock from seven hundred and fifty million (750,000,000)
to one billion (1,000,000,000) shares of common stock, par value $0.001 per share.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><B>Item 9.01 Financial Statements and Exhibits.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><I>(d) Exhibits</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%">
<TR STYLE="vertical-align: top; text-align: left">
    <TD STYLE="width: 10%; font: bold 10pt Times New Roman, Times, Serif; font-variant: normal">Exhibit No.&nbsp;&nbsp;</TD>
    <TD STYLE="width: 5%; font: bold 10pt Times New Roman, Times, Serif; font-variant: normal">&nbsp;</TD>
    <TD STYLE="width: 85%; font: bold 10pt Times New Roman, Times, Serif; font-variant: normal">Description</TD></TR>
<TR STYLE="vertical-align: top; text-align: left; font: normal 10pt Times New Roman, Times, Serif">
    <TD STYLE="font: normal 10pt Times New Roman, Times, Serif; font-variant: normal">&nbsp;</TD>
    <TD STYLE="font: normal 10pt Times New Roman, Times, Serif; font-variant: normal">&nbsp;</TD>
    <TD STYLE="font: normal 10pt Times New Roman, Times, Serif; font-variant: normal">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top; text-align: left; font: normal 10pt Times New Roman, Times, Serif">
    <TD STYLE="font: normal 10pt Times New Roman, Times, Serif; font-variant: normal; text-align: center; vertical-align: top">3.1*&nbsp;</TD>
    <TD STYLE="font: normal 10pt Times New Roman, Times, Serif; font-variant: normal">&nbsp;</TD>
    <TD STYLE="font: normal 10pt Times New Roman, Times, Serif; font-variant: normal">
Amendment to the Articles of Incorporation, dated January 18, 2012</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">*Filed herewith&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>SIGNATURES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant
to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Current Report to be signed on
its behalf by the undersigned hereunto duly authorized.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: -6.6pt; padding-left: 5.4pt; line-height: 115%; font-weight: bold">MUSCLEPHARM CORPORATION</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 16%; padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="width: 16%; padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="width: 16%; padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="width: 3%; padding-right: -6.6pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="width: 33%; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="width: 16%; padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-right: -6.6pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">Date: January 27, 2012</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-right: -6.6pt; padding-left: 5.4pt; line-height: 115%">By:</TD>
    <TD STYLE="border-bottom: windowtext 1pt solid; padding-left: 5.4pt; line-height: 115%; font-style: italic">&nbsp;/s/ Brad J. Pyatt</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-right: -6.6pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-left: 5.4pt; line-height: 115%">Name: Brad J. Pyatt</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-right: -6.6pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-left: 5.4pt; line-height: 115%">Title: Chief Executive Officer</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%">&nbsp;</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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{"company-data": {"conformed-name": "MusclePharm Corp", "cik": "0001415684", "assigned-sic": "2834", "irs-number": "770664193", "state-of-incorporation": "NV", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-53166", "film-number": "12552696"}, "business-address": {"street1": "4721 IRONTON STREET", "city": "DENVER", "state": "CO", "zip": "80239", "phone": "(800) 210-7369"}, "mail-address": {"street1": "4721 IRONTON STREET", "city": "DENVER", "state": "CO", "zip": "80239"}, "former-company": {"former-conformed-name": "Tone in Twenty", "date-changed": "20071018"}}
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington D.C. 20549
FORM 8-K
CURRENT REPORT
PURSUANT TO SECTION 13 OR 15(D) OF
THE SECURITIES EXCHANGE ACT OF 1934
Date of Report (Date of earliest event reported):
January 18, 2012
MusclePharm Corporation
(Exact name of registrant as specified in its
charter)
Nevada
000-53166
77-0664193
(State or other jurisdiction
of incorporation)
(Commission File No.)
(I.R.S. Employer
Identification Number)
4721 Ironton Street, Building A
Denver, Colorado 90839
(Address of principal executive offices)
(303) 396-6100
(Registrant's telephone number, including
area code)
Check the appropriate box below if the Form
8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
£
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
£
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
£
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
£
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Item 5.03 Amendments to Articles of Incorporation
or Bylaws; Change in Fiscal Year.
Amendment to Articles of Incorporation
On January 18, 2012, MusclePharm Corporation
(the "Company") filed an amendment to the Company's articles of incorporation with the Secretary of State of
the State of Nevada to increase the Company's authorized common stock from seven hundred and fifty million (750,000,000)
to one billion (1,000,000,000) shares of common stock, par value $0.001 per share.
Item 9.01 Financial Statements and Exhibits.
(d) Exhibits
Exhibit No.
Description
3.1*
Amendment to the Articles of Incorporation, dated January 18, 2012
*Filed herewith
SIGNATURES
Pursuant
to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Current Report to be signed on
its behalf by the undersigned hereunto duly authorized.
MUSCLEPHARM CORPORATION
Date: January 27, 2012
By:
/s/ Brad J. Pyatt
Name: Brad J. Pyatt
Title: Chief Executive Officer