On Gossip Girl, Leighton Meester plays Blair Waldorf, one of our favorite characters, a mostly proper young woman who only rarely lets her guard down.

When she does let her sexy side shine, though, Blair certainly knows how to channel her inner bad girl. In this photo shoot with GQ, Leighton does too:

Leighton Meester is a good girl gone bad!

The 23-year-old actress and aspiring singer absolutely sizzles inside the magazine, which names her its Obsession of the Year. No objections here!

This might be the sexiest photo shoot she's ever done. Not that we're complaining Click to enlarge lots more Leighton Meester pictures from GQ ...

[Photos: GQ]

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