Is that Jennifer Lopez's bare butt in 'The Back Up Plan'?

Back-up-plan-poster.jpgIn "The Back -Up Plan," Jennifer Lopez's new rom-com, there's a scene where her pregnant-with-twins character is facing a mirror, checking out her expanding naked body.

When her boyfriend ( Alex O'Loughlin) comes in the room, she races into the closet to hide and audiences get a glimpse of her character's bare bum.