<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>barrett.txt
<TEXT>







SEC Form 3, Form 4 and Form 5 and Application for EDGAR Access
(Form ID) Confirmation of Authority to Sign

Pursuant to Instruction 7 to SEC "Form 3 - Initial Statement of
Beneficial Ownership of Security," "Form 4--Statement of Changes
in Beneficial Ownership" and "Form 5 - Annual Statement of
Beneficial Ownership of Securities" the undersigned, being a
Trustee of MassMutual Corporate Investors and MassMutual
Participation Investors (each, a "Trust"), hereby appoint and
designate Sara Stinson, Mark Godin, Melissa Busso, Ruth Howe,
Ann Malloy and Melissa LaGrant and each of them singly, my true
and lawful power of attorney with full power to (a) apply for
access to the EDGAR filing system in my name and (b) sign for me
and file with the Securities and Exchange Commission, the New York
Stock Exchange and the Trust said SEC Forms 3 4 and/or 5 with
respect to shares of the Trust purchased or sold by the undersigned
or any other change of beneficial ownership relating to equity or
derivative securities of the Trust required to be reported by the
undersigned.

This authorization shall remain in effect until a written revocation
is executed by the undersigned and filed with the Securities and
Exchange Commission.



Signature and Date:                        October 18, 2007
                 ------------------------------------------------

Name:    William J Barrett
Title:   Trustee of MassMutual Corporate Investors
         and MassMutual Participation Investors


















</TEXT>
</DOCUMENT>
