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iCarly star Miranda Cosgrove was in New York City on Friday and stopped at Z100′s Jingle Ball 2009 holiday concert at Madison Square Garden. The December 11th event supported the Food Bank of NYC. Cosgrove was in a giving mood. Earlier that day she was at the Today Show and helped out with their annual toy drive. The actress was also honored on the 9th at the Power of Youth event in Beverly Hills for her work with St. Jude Children’s Hospital.

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Justin Bieber made his way to Z100′s Jingle Ball in New York City on Friday, December 11th, cast and all. The singer performed at the Madison Square Garden holiday concert with his broken foot that happened last month on tour with Taylor Swift.

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Looking beautiful at Z100′s Jingle Ball in New York City, actress and singer Leighton Meester attended the annual holiday concert at Madison Square Garden on December 11th.

I love her choice of Louise Golden’s funky dress.

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New Moon actor Peter Facinelli was on hand for Z100′s Jingle Ball 2009 at Madison Square Garden in New York City on Friday December 11th. The event was sponsored by H&M and the Food Bank for NYC benefited from the ticket sales and donations. My favorite vampire coven leader, Dr. Cullen, looked great all bundled up for the cold.

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Season eight American Idol contestant Allison Iraheta dropped in to Z100′s Jingle Ball at Madison Square Garden in New York City Friday December 11th. The singer is promoting her debut album Just Like You. Hear her first single ‘Friday I’ll Be Over You’ here.

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Leighton Meester performed at KIIS FM’s Jingle Ball at the Nokia Theater in Los Angeles on December 5th. The Gossip Girl actress sang her hit single ‘Somebody To Love.’ Check out the video below and tell us what you think.

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