Last Night's Look: Hit or Miss?

Vote on this week's styles including Reese Witherspoon, Demi Moore and more stars! You decide – are they fashionistas or flops?

  • KATY PERRY photo | Katy Perry

Credit: Casey Rodgers/AP

Updated: Friday Oct 30, 2009 | 11:55 AM EDT

KATY PERRY

The birthday girl ditches her quirky fashion for a sexy white Hervé Léger by Max Azria bandage dress, satin heels and a sweet treat for the her birthday bash sponsored by 42 Below Vodka in Hollywood.