Leighton Meester sat front row at the Proenza Schouler fashion show -- where all eyes were on her bare belly.

The "Gossip Girl" star, wearing one of the designer's creations, joined Courtney Love, Anna Wintour, Rachel Zoe and Rashida Jones in the audience of the tweed and color filled runway.

Check out all the designs on the catwalk -- and the celebs who love them.

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