Kardashian Bikini Off Who'd You Rather?

1/14/2011 11:45 AM PST

Kardashian Bikini Off: Who'd You Rather?

Kim Kardashian tweeted a pic of herself in full face makeup and a bikini, while older sis Kourtney didn't want to be outdone and flaunted her post-pregnancy bikini body in Miami on Friday.

Question is ...