Whether they're good friends, or meeting eachother for the first time...these celebs sure know how to party together!!

Steps & Britney Spears hanging out backstage at the 1999 Teen Choice Awards!

Lucky Geri!! She's spending time with a couple of her incredibly cute buddies from Irish pop-group Boyzone.

Britney Spears and Howie Dorough (of the Backstreet Boys) share a smile!