Some of the biggest stars in music hit the stage for Z100’s Jingle Ball in NYC last weekend. We’re talking Justin Bieber, One Direction, Taylor Swift, The Wanted… yeah, you get the idea.

Before and after performing in front of thousands of fans, many of these big names hung backstage at the Pop Tarts Artists' Lounge. They chatted it up with DJ JJ and ate plenty of Pop Tarts at the toasting bar. (Um, where can we get one of those?)

Check out the gallery to see all the backstage action!

Apparently, girls who punch other girls in the face because they think you're flirting with someone else seems to be something The Wanted singer Max George is into.

Most people would run far away after being indirectly involved with Lindsay Lohan's nightclub arrest last week, but the singer says the actress is "a good girl." That's probably because Lindsay has been acting like a proper groupie. She managed to get backstage at The Wanted's show in Philadelphia earlier this week and, most recently, Lilo was hanging out with the band on their tour bus as Max's "special guest" en route to a show in Boston, according to TMZ. 

Um, so what the hell is going on between Lindsay and Max? Find out after the jump!

Christmas is right around the corner and you know what comes with it, right? KIIS FM Jingle Ball star-studded concert! What did you think I meant? While the annual show is usually only for one seriously-epic night, host Ryan Seacrest made the announcement today that this year would be not one, but TWO nights of awesomeness.

Stars like Taylor Swift, Justin Bieber, The Wanted, FUN. and more will take the stage at Nokia Theatre L.A. Live and there’s sure to be other big name celebs in attendance.

Check out the full list of performances after the jump!