Mila Kunis and Justin Timberlake’s off-screen antics mimic their on-camera chemistry in 'Friends with Benefits.' ET's Chris Jacobs spoke to the dynamic duo about their backsides stealing so much screen time."I don't feel comfortable talking to another man about it," Justin told Chris. Mila pried a response out of him instead, prompting him to describe the experience as "airy" and "breezy." The "shameless" multi-faceted entertainer and entrepreneur added, "I was Mila's stunt butt." Another headline-making derrière belongs to Your Royal Hotness, Pippa Middleton, who Justin calls "smokin'."The two megastars gave Patricia Clarkson quite an eyeful on her first day of filming. "I walk[ed] in on two of the hottest stars in Hollywood naked! It was a very fun way to start shooting; to see them in all their glory."Continue reading...