Paige VanZant vs Tana Mongeau -- Peek-A-Booties Edition

Peek-a-boo ... we see you, Paige VanZant and Tana Mongeau.

The blonde bombshells soaked up the summer sun, but not without giving a sneak peek at some of their buns.

Paige is rockin' blue swimwear and stickin' her tongue out, while Tana opted for a kissy face selfie.

The question here is: Who'd You Rather?!