• KATY VS. CARA  photo | Cara Delevingne, Katy Perry

Credit: Splash News Online; Pacific Coast News

Published: Wednesday December 17, 2014 06:00 AM EST

2014

KATY VS. CARA

There's one very subtle difference in how the singer and the model style their pepperoni pizza onesies.But if you're not, like, a fashion person, you might miss it so don't feel bad.