Tina Fey

Thursday's episode of 30 Rock aired live on the both East and West Coasts, but the second broadcast made some sly adjustments.

During the East Coast broadcast, the opening number was sung by Jane Krakowski, while Cheyenne Jackson did the honors in the later broadcast, altering some of the lyrics. Chris Parnell tweaked the lyrics of Leo Spaceman's love songs, and the lines during the "commercial" from hook-handed Dr. Drew Baird (Jon Hamm) were also changed.

The live episode also featured guest appearances from Matt Damon and Julia Louis-Dreyfus who played Tina Fey's Liz Lemon in flashbacks.

Watch both versions below and see how many changes you catch. Which version do you like better?

East Coast:

 West Coast: