Friends Season 6 Episode 10 : The One With The Routine (a.k.a. The One With The Rockin' New Year)
Janine gets a job dancing for Dick Clark's New Year's Rockin' Eve and invites Joey, Ross and Monica to come with her. While there, Joey tries to ensure he gets a kiss at 'midnight' while Monica and Ross try to ensure they get on camera leading them to pull out an old dance routine. Meanwhile, Phoebe, Chandler and Rachel look for Monica's Christmas presents so that they can buy her something suitable in return.