Now that's one hot mama!

Britney Spears has certainly been hitting the gym. The mother of two took to Twitter to share an adorable family snapshot, showing off her killer bikini body (she's baaaack!) as she poses with sons Preston, 6, and Jayden, 5.

"Getting ready for some pool time! Having a blast xxoo," Spears tweeted from Hawaii.

So who's the lucky guy behind the camera? We have a feeling that fiance Jason Trawick was the one to elicit such megawatt smiles from his family-to-be.

Check out Spears' family photo below:
britney spears bikini

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