Ep 22. Kidney Now!

In 30 Rock season 3 episode 22, titled "Kidney Now!", Jack struggles to find a suitable kidney donor for his father. He approaches several celebrities, including Elvis Costello, Clay Aiken, Mary J. Blige, and Adam Levine, to help him record an awareness song for kidney transplantation. As they gather in the studio to record the song, they find out that one of them may actually be a suitable donor.

Meanwhile, Liz struggles to deal with her breakup with Floyd and tries to keep her mind off of him by focusing on her work. However, her attempts at being productive only lead to hilarious mishaps and she eventually turns to Kenneth for comfort.

Tracy, on the other hand, decides to get a tattoo in honor of his newfound respect for the art of filmmaking. However, things take a turn for the worst when he realizes that he made a huge mistake.

Throughout the episode, there are plenty of hilarious moments and celebrity cameos that fans of the show are sure to enjoy. The episode also touches on important issues such as organ donation and the importance of friendship in times of need. Overall, "Kidney Now!" is a touching and funny episode that showcases the best of what 30 Rock has to offer.