Just before half an hour into Pimp, Haley Ramm and Keke Palmer have a sex scene. Both Haley and Keke are topless but the scene is very dark and shadowy. You never get a clear shot of their breasts and it looked like they were wearing pasties anyway.
The very next scene, Haley wears a somewhat see through top with no bra as she and Keke talk for a bit.
A couple of minutes later, Vanessa Morgan is wearing a pretty revealing costume made of sequins while dancing on stage. Vanessa then gives Keke a private dance and you see more of her costume including several shots of her ass in a beaded g-string.
Keep in mind that this review is based on a cut from before Lee Daniels became a producer so it may be different from the final product whenever it gets released.