Katy Perry: Blue Bow Strapless Dress

Katy Perry arrives at the Glamour Women of the Year Awards at Berkeley Square in London on June 2 2009 – photo: PacificCoastNews.com

The Foley + Corinna Bow Dress pictured below is exact, but in a royal blue instead of Katy’s teal shade.
I believe the exact purse is by Lulu Guinness, but the closest one on their website is metallic red (and £225…eek!)