Leo DiCaprio and His Ex Reunite South of the Border

Bikini babe Bar Refaeli joins the actor on a Mexican getaway. Get a sneak peek at their holiday snap!

In today's second installment of "couples who split up but are now taking holiday vacays together," we bring you Leonardo DiCaprio and Bar Refaeli.

Leo and his supermodel GF called it quits earlier this year, and the actor has since been partying with his boys and looking very single in Hollywood as recently as two weeks ago at Voyeur.

But here are photos of the twosome on a romantic getaway south of the border, frolicking on the beach in the Riviera Maya.

Are they giving it another go in 2010?

One thing's for sure: Bar's body looks bangin', but Leo should consider adding some crunches to his list of New Year's resolutions.

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They might be back on, but we can't say the same for everyone in our Big Celebrity Splits gallery.