Two Hot Mamas And A Sexy Single! Reese Witherspoon, Drew Barrymore & Cameron Diaz Strip Down At Bikini Bootcamp

Having a friend with a hot body like Cameron Diaz’s is the perfect inspiration to blast that extra baby weight – especially when you spend the day with her on the beach nearly naked!

Reese Witherspoon and Drew Barrymore, who both welcomed babies in 2012, joined their sexy single friend on an all-girls vacation this week in Tulum, Mexico, where they stripped down into sexy swimsuits and showed off their beach bods – and RadarOnline.com has the photos.

RadarOnline.com exclusively revealed on Tuesday that the A-list trio had embarked on an expensive fitness vacation at the Amansala Resort where they had enlisted in Bikini Bootcamp – the same place Demi Moore visited over the holidays.

“They are at the resort for a girls-only getaway,” a source told RadarOnline.com. “And they are having a blast. No husbands and no kids!”

Along with getting pampered by daily massages and treatments and sweating up a storm in yoga, dance and cardio classes, the girls took some time to take a dip in the beautiful blue Caribbean, where Drew and Reese showed off their post-preggers bathing suit bodies and Cameron showed off her impossibly perfect famous figure.

Drew welcome her first child with Will Kopelman, Olive, in 2012, while Reese gave birth to her third, Tennessee James, with husband Jim Toth.