Watch Ronda Rousey's bodypainting session for the Swimsuit Issue

Also featuring lots of Lindsey Vonn and Caroline Wozniacki

“I can assure you that I have no clothes on," former UFC bantamweight champion Ronda Rousey says in this new video with behind-the-scenes footage for Sports Illustrated's swimsuit issue.

“I have not worn a bra for a long time now," she says. "I think this is the longest I’ve just like walked around naked since I was like 10.”

The video also features lots of skiiing champ Lindsey Vonn and tennis star Caroline Wozniacki making like canvases and getting painted. It looks a lot like getting tickled but results in a human piece of art.

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