Selena Gomez flashes half her bottom in tiny denim hot pants!

Justin Bieber's ex girlfriend suffers embarrassing fashion fail as she takes a stroll in LA

SELENA Gomez exposed half her pert derrière in a tiny pair of denim hot pants today.

The 22-year-old accidentally-on-purpose displayed her bottom to the world as she took a stroll in the LA sunshine.

Not only did the outfit reveal her behind, but it also exposed a rather nasty bruise on her right thigh - ouch!