Topless Bar Refaeli Wears Skimpy Bikini Bottoms and Jumps for Joy in Sexy Beach Pic

Sports Illustrated model and Leonardo DiCaprio's ex-girlfriend joins Facebook and shares the swimsuit shot with her fans

Bar Refaeli certainly is heating up Facebook!

The Sports Illustrated model launched her Facebook page Tuesday, grabbing fans' attention with a topless photo of her at the beach.

In the shot, the 26-year-old Israeli beauty jumps in the air, covers her chest with one arm and flashes a peace sign above her head with the other. "Go Bar" is spelled out in rocks in the sand beneath her.

Refaeli, who previously dated Leonardo DiCaprio, quipped on Twitter, "Let's see how many social networks I can manage! Good luck B"

In addition to her modeling career, Refaeli is the creator of Under.me, an underwear line focusing on simplicity and understated style.