Gossip Girl star and model Taylor Momsen (Jenny Humphrey) donned a flowing green Marchesa gown to the amfAR New York Gala at Cipriani on 42nd Street.

Taylor helped kick off 2009 Fashion Week in New York City Thursday night ...

Always one to make a fashion statement and never one to shy away from controversy, the 15-year-old came out to support amfAR - The Foundation for AIDS Research.

Click to enlarge more pictures of Taylor's green gown ...

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