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The season finale of 30 Rock capped a hilarious episode with an all-star "We Are the World" type sing-along featuring Mary J. Blige, Clay Aiken, Sheryl Crow, Adam Levine of Maroon 5, Norah Jones, Cyndi Lauper, two-thirds of the Beastie Boys and all of Elvis Costello.

Check out Tina Fey, Alec Baldwin and this rousing organ-related tune, and you may find yourself moved to donate a kidney—or two—to the cause. (And if you are so moved, go here. Seriously.)