In the following recent "30 Rock" webisode, Madonna has to pull out of performing during the Super Bowl half-time show and Alec Baldwin's character tries to enlist Ryan Adams, Donald Glover, a Doobie Brother and ulitmately Cee-Lo Green to fill in — only they are only allowed to sing a limited amount of songs that NBC owns. It's not bad:
http://www.eonline.com/news/watch_with_kristin/watch_now_30_rock_webisode_tries_find/291185
