Gossip Girl star Taylor Momsen (Jenny Humphrey), along with Michelle Trachtenberg, who played Serena's nemesis Georgina Sparks in a memorable Season One stint, got their kicks Wednesday at the launch party for Reebok FLASH in New York City ...

"FLASH" A SMILE: Free of raccoon makeup, Gossip Girl star Taylor Momsen looks pretty at a New York event. Always nice to have a Michelle Trachtenberg sighting, as well.

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