Reimschuessel / Splash News
Sometimes photographers have no idea what is going on behind the scenes (pun intended) on the red carpet.
The three glam ladies posed for a group shot, so Mann decided to have a little bit of fun and grabbed Diaz's leather-clad butt. Unfortunately we can't see Diaz's immediate reaction but judging by their playful relationship, we are willing to bet the blond beauty didn't mind that her co-star briefly touched her bottom.
As for their formal looks, Diaz opted for a skintight long-sleeve number, Mann donned a sleeveless bright patterned dress and Upton wore a cap-sleeve black frock.