Seems NBC is looking to “rock” the house. The network booked Mary J. Blige
along with Clay Aiken, Elvis Costello, Sheryl Crow and Adam Levine of Maroon 5 for
the May 14 season finale of “30 Rock."
The network is remaining hush NBC about each artist particular
role, saying only that the finale will be a "special episode featuring
Alan Alda and surprise musical guests."
Also appearing in the episode is Alan Alda, who plays a
character named Milton.
The episode is called "Kidney Now!" but the network is remaining hush
about the roles of each character. Sherri Shepherd will also reprise her
occasional role as Tracy's (Tracy Morgan) wife.
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Seems NBC is looking to “rock” the house. The network booked Mary J. Blige
along with Clay Aiken, Elvis Costello, Sheryl Crow and Adam Levine of Maroon 5 for
the May 14 season finale of “30 Rock." 
