Cameron Diaz Goes Nude For 'Sex Tape'

With her 42nd birthday approaching (August 30th), Cameron Diaz is feeling better than ever - and baring it all for the cameras for the first time.

Diaz will be appearing in "Sex Tape" alongside "How I Met Your Mother" actor Jason Segel... and informs fans that there will be plenty to see.

"It's a first for me," she says of being nude for the camera. "But Jason [Segel] gets naked, too. It's just a part of the role. So I did it. I mean, you see everything."

Well, anyone who has seen "Forgetting Sarah Marshall" knows that Jason Segel isn't shy about baring it all. But, "everything?" Interesting. Tantalizing, even.

Will the lure of Diaz's naked body be enough to bring in extra audience members when the movie hits theaters in July?

She certainly looks good! Diaz graces the cover of Esquire's August issue, looking crazy fabulous for 41 - or heck, any age - in a high-cut bathing suit.

"I like being 41," she tells Esquire. "It's the best age. So much s*** just falls away. That's when a woman knows how to work things, or she doesn't care about that anymore. You just stop being afraid. You don't worry about what men think. You don't worry that time registers anything awful."

"Sex Tape," which hits July 18th, follows a married couple who wakes up to find that the sex tape they made the previous night has been released for all to see.

Check out the trailer below!