Cameron Diaz is going for a brand new look in 2012!

Three days before ringing in the new year, the 39-year-old Bad Teacher star unveiled her sexy, toned bikini body in Hawaii. Though her frame was once quite muscular, Diaz -- wearing a gray and yellow two-piece -- looked much more feminine than she did in August.

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The single actress -- who's been hooking up on-and-off with Sean "Diddy" Combs since 2008 -- believes her body has only gotten better with age.

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"The more I work on my body at this age, the better it gets," she told Harper's Bazaar in 2010. "I feel so much more attractive now. A thousand percent. I'm appreciating my skin and my wrinkles and all those things."

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Diaz, who swam with dolphins during her Hawaiian getaway, also debuted a new bleach blonde bob.

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