Demi Lovato and Joe Jonas Rock Jingle Ball

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Sounds like a concert I would have liked to see! Demi Lovato and Joe Jonas, plus Kelly Clarkson, Avril Lavigne, and even a couple of "Jersey Shore" stars -- Sammi "Sweetheart" Giancola and Deena Cortese -- were among those who hit the stage for the Q102 Jingle Ball 2011 concert at the Wells Fargo Center in Philadelphia, Pennsylvania, Wednesday.

"Skyscraper" singer Demi, who performed in a sequined black dress, revealed on the red carpet the worst Christmas present she ever received. "It was actually a hamper ... a dirty laundry hamper, and it was from my grandma," the 19-year-old said. That was a sweet thought, but I definitely understand the disappointment! Demi said she was much happier the year her wish for a telescope was fulfilled.

No doubt that at some point during the night Demi encountered her ex, Joe Jonas, who performed tunes from his debut solo album. (Do you think the former couple talked?) The JoBro also used some of his time on the red carpet to present a check for $15,000 from the event to the Ryan Seacrest Foundation's program The Voice at the Children's Hospital of Philadelphia, a broadcast studio for patients to use.

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"Had an amazing time tonight at the #Q102 #JingleBall tonight. Great lineup. Great show. Can't wait for Boston tomorrow! .. Or today..," he tweeted in the early hours of Thursday morning. Joe is scheduled to sing in Lowell, Massachusetts, before performing in Scranton, Pennsylvania, on December 10, and wrapping up his tour in Rosemont, Illinois, on December 17.

Check out some of Demi and Joe's performances:

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