Philly Hosts a Star-Studded Jingle Ball
The "Sk8er Boi" singer kept things simple in a long-sleeved black top, black skinnies, and matching platform heels while her 17-year-old colleague sported an orange and black striped shirt, black jacket, and black pants.
Posing for pics on the red carpet, Pete Wentz wore a Metallica T-shirt as he joined his band Fall Out Boy before hitting the stage.
Unfortunately, Austin had a rough time during his travels, sharing his gripes on Twitter. "Having the worst flight ever!!! I'm sitting next to a crying baby... Then the mom stares at me... Then spilt her drink on me... The seats barley recline to 1inch........... And everytime I finally get to fall asleep the baby hits me!!!!!!!!! I JUST WANT SOME SLEEP!!! (And a new seat). While I was in the bathroom tweeting to you guys..... she stole my pillow.. #pillowless. Got 2 hours til I land, no pillow, no sleep, at least the baby is comfortable now and I have wifi."