It's spring break fever in Hollywood this week, and with most kids off from school, that means it's time for some family getaways. Or, for some, just another excuse to leave Hollywood and lounge on a beach because, well... they can.

While Reese Witherspoon went on a romantic birthday trip to Mexico with her hubby Jim Toth, Heidi Klum and her boyfriend Martin Kristen indulged in some R&R with her kids in Hawaii. Click after the jump to see the bikini bods and what the stars are up to this spring break!

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It looks like things are going well between Heidi and her bodyguard Martin, who are currently on vacation in Hawaii with her kids. The best part is, he knows how to entertain the little ones and was photographed playing games with them on the beach. The happy couple even managed to fit in a romantic stroll on the beach, and vacay has just started!

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Britney Spears shows off her surprisingly toned bikni body, wearing a blue-and-white striped bathing suit while hanging out at a friend's house in Malibu. No word on whether or not she was hanging out with her new beau, but it definitely doesn't seem like Brit is too upset over her called-off engagement!

Model Doutzen Kroes flaunts her fabulous figure in a colorful bikini while splashing around the ocean in Miami. The Victoria's Secret Angel is vacationing with her husband and son, and has been snapped indulging in some fun family time all weekend long.

Leslie Mann and Judd Apatow kick off their shoes for a hand-in-hand stroll on the beach in Malibu. It may look like this was just a romantic day for the two of them, but the happy couple was joined by their daughter Maude, making it a family affair.

Patrick Schwarzenegger is all grown up and he isn't afraid to show it! The 19-year-old son of Arnold Schwarzenegger actually is on spring break with his friends in Miami, and enjoyed some time hanging at the beach and playing football in the ocean.

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Famous couple Naomi Watts and Liev Schreiber spend the day at the beach in Malibu with their two sons, where the Academy Award nominated actress looks spring-ready in a pair of jean shorts, sunglasses and a hat!

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Happily married Reese and Jim enjoy an oceanside lunch in Cabo san Lucas, Mexico, where they took a romantic getaway together to celebrate her 37th birthday.

If you were a celebrity, how would you spend your spring break?

Photos Courtesy of: Fame/Flynet