Critical Mass: Is this a 'Sex Tape' you'd pay to see?

Jason Segel and Cameron Diaz are back together again. After starring in Bad Teacher, the 2011 comedy hit that topped $100 million, they reunite to play a married couple who’ve lost their spark. Kids, work, and age have taken their toll on what was once a spontaneous and prolific sex life, and Annie and Jay try to get it back by making their own homemade sex tape. But when their video gets uploaded to the Cloud by accident and sent to their friends, neighbors, and even their mailman, they have to race around town to prevent the naughty movie from becoming a scandal.

Cameron Diaz, Jason Segel Show Their 'Sex Tape' at L.A. Premiere: It's a 'One-Night Adventure'

"You'll get in the car afterward and talk about how funny the movie was," Segel told THR. "Then you'll have the real discussion about how you're not having enough sex."

Cameron Diaz and Jason Segel weren't ashamed of their Sex Tape at the film's Thursday-night premiere at L.A.'s Regency Village Theatre. Fans dressed in Sex Tape-themed tank tops, robes and sleep masks, chanting for the duo as they made their way down the red carpet.