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Mary J Blige and Sheryl Crow will also star in hit TV show

Elvis Costello, Maroon 5 frontman Adam Levine, Mary J. Blige and Sheryl Crow are set to appear in the season finale of hit television show ’30 Rock’.

The NBC comedy series, which stars Tina Fey and Alec Baldwin, is set to air on May 14 at 9:30pm EST/PST and 8:30pm CST.

The episode is called ‘Kidney Now!’ and will also feature other surprise musical guests.

–By our Los Angeles staff.
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