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Bridget Marquardt is still happy to show some skin!

The former Playboy model and "The Girls Next Door" star hit the beach this week in Malibu, showing off her fit physique in a teeny, tiny purple bikini.

Hugh Hefner's ex was seen working out with a hula hoop while listening to music on her headphones.

The 40-year-old has been working hard on her fitness lately, tweeting about taking part in the 30 Day Squat challenge. The fitness routine has you gradually go from doing 50 squats to 250 squats in a 30-day period.

While Kendra Wilkinson and Holly Madison have gotten all the attention since their reality show ended, we always loved Bridget. Which of them was your favorite?

Sound off below -- and see how other Playboy centerfolds have aged through the years. 

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