Khloe and Kourtney Kardashian treat the sidewalk in front of their Calabasas studio like a catwalk!

Okay, so having a pool of photographers waiting outside encourages these ladies to look their best when they go to record voice overs for their show. And Friday was no different -- Khloe strutted her stuff in a tight tank with a pink lace bra peeking out and some tight Good American jeans, showing off her famous derriere; while Kourtney flaunted her cleavage in a plunging silk cami with her favorite Alexander Wang x Adidas track pants and heels.

Who's look do you like best?