Kidney Now!.

About Kidney Now!

"Kidney Now!" is the twenty-second episode and season finale of the third season of the American television comedy series 30 Rock, and the 58th overall episode of the series. It was directed by series producer Don Scardino, and written by show producers Jack Burditt and Robert Carlock. The episode originally aired on NBC in the United States on May 14, 2009. Guest stars in this episode include Alan Alda, Kay Cannon, Donald Glover, Napiera Groves, Chris Parnell, Paula Pell, and Sherri Shepherd. In addition, "Kidney Now!" featured many musical guest stars including Clay Aiken, Elvis Costello, Mary J. Blige, Sheryl Crow, the Beastie Boys, Steve Earle, Adam Levine, Sara Bareilles, Wyclef Jean, Norah Jones, Talib Kweli, Michael McDonald, Rhett Miller, Moby, Robert Randolph, Rachael Yamagata and Cyndi Lauper, all as themselves.