Jennifer Aniston jen30rock.jpgCourtesy Nicole Rivelli/NBC

Jennifer Aniston returned to NBC last night, playingTina Fey's old party-girl friend from Chicago.

And although what's quickly becoming one of our fave comedies has kicked the new season off with plenty of star cameos (Oprah!), we think Jen, playing "crazy putty", hit the ball out of the park!

She must've been pretty psyched about her performance, too, because she celebrated with a night out on the town with John at NYC's La Esquina!

What did YOU think of her turn on 30 Rock?