Hayden Goes Bold in an Itty-Bitty LBD

Hayden Panettiere got sexy in micro-mini lace dress for the Blackberry Launch party at Villa last night.

Good thing she was wearing that nude slip, cuz her lace dress already leaves little to the imagination!

We weren't the only ones who took note of Hayden's sexy new look. Her ex Stephen Colletti was spotted cozying up to the actress inside...