<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>lauragrant.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 the Treasurer of MassMutual Corporate Investors and
MassMutual Participation Investors (each, a "Trust"), hereby appoint and
designate (i) Rosemary Baker (ii) Kelly Schetzel and (iii) Mark Godin, 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:                 S/Laura Grant   July 15, 2005
                           -------------------------------------------------

Name:    Laura Grant
Title:   Treasurer, MassMutual Corporate Investors and MassMutual
Participation Investors.


















</TEXT>
</DOCUMENT>
