Kelly Clarkson, Avril Lavigne, Demi Lovato And More Rock The Jingle Ball (PHOTOS)

The city of brotherly love was all about the sisters last night, as our favorite ladies of pop helped Philadelphia get into the holiday spirit at Q102’s Jingle Ball concert. Christmas cookie decorator Avril Lavigne, Neon Hitch (who will be performing alongside Travie McCoy on Late Night tonight) and JoJo took the stage at the Wells Fargo Center, as well as Demi Lovato, who couldn’t help but gush over fellow performer Kelly Clarkson. The “Skyscraper” singer geeked out during Kelly’s set, tweeting not only the lyrics to “Mr. Know It All” but also “MY LIFE WOULD SUCK WITHOUT YOU!!!!!!! #fangirling”. Tell us which gal was best dressed below.