• KATY VS. ASHLEE photo | Ashlee Simpson, Katy Perry

Credit: John M. Heller/Getty; Jason Merritt/WireImage

Published: Monday November 12, 2012 16:00 PM EST

2012

KATY VS. ASHLEE

Katy gives her Temperley London gown the hippie-chic treatment by letting it casually hang off one shoulder, but Ashlee plays it straight with minimal accessories.