Bar Refaeli is going all the way to promote her own self-branded underwear line called “under.me.” She unveiled the line in a sexy new video posted on her Facebook page that leaves little to the imagination.

The Israeli beauty showed off her body in a bra and panties and primps in the nude in front of a bathroom mirror. “I feel I look my best when I’m comfortable, especially when it comes to underwear,” says Refaeli, 27.

Check out Bar’s photos; click to enlarge.

The former Sports Illustrated swimsuit cover girl joins a growing line of supermodels, including Elle MacPherson and Gisele Bundchen, who are developing their own fashion lines.

“My secret is living a healthy lifestyle,” she says. “It’s really important because looking glamorous and looking sexy comes also from the inside. So if you eat healthy, if you work out, if you keep in shape [you’ll look good].

“Also having a sense of humour about life, taking things easy – it’s a big part of the way you present yourself.”

Refaeli boxes, jumps rope, strength-trains and does lot of cardio and martial arts-based exercise, notably Krav Maga. Despite the pressure to be skinny in modeling, her main goal is to be fit and healthy — not ultra-thin.

“I don’t feel the need to be super-skinny, but being in shape is important,” she says. “But even if I wasn’t in this industry, I would still want to look after myself and be healthy and keep my body in good condition.”

Check out her video below and screen shots above.