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CENTENNIAL MOMENT
New York City Mayor Michael Bloomberg helps Gossip Girl stars Kelly Rutherford, Blake Lively, Penn Badgley and Matthew Settle celebrate their 100th episode in New York on Thursday.
More from PEOPLE
New York City Mayor Michael Bloomberg helps Gossip Girl stars Kelly Rutherford, Blake Lively, Penn Badgley and Matthew Settle celebrate their 100th episode in New York on Thursday.
