Ashley Graham is out to prove that size does not matter when it comes to having fun at the beach, especially when it involves twerking in a tiny thong.

Twerk-Off

The plus-size model got her groove on during a break from shooting the annual swimsuit issue of Sports Illustrated magazine. In a footage taken from the beach photo shoot shared on the magazine's official Instagram page, Graham revealed what prompted her to twerk along with the crew while dressed only in a pair of skimpy bikini.

"We have a lot of fun on set. We work hard but we play even harder. There was a couple twerk-offs, because Darcie knows how to twerk. But I was in a thong more than once, so I had to let them know what I was packing," Graham explains in the video.

The clip shows the Sports Illustrated model goofing around along with the crew and twerking her butt off amid the cheers from those around her. The footage shows Graham twerking with Darcie Baum, the magazine's senior editor.

Aside from the twerk-offs, Graham appeared calm and happy as she splashed around on the beach during her photo shoot. At one point, she cracks up as she strikes a pose in her red-and-white striped bikini while on all fours and with the waves splashing against her body.

She later shared a photo from the shoot on her own Instagram, where she challenged other women to show off their natural body. "Show me something' natural like a** with some stretchmarks' OR cellulite," Graham captioned the photo of herself in a thong.

Body Confidence

The 30-year-old American model clearly feels comfortable and confident in her own skin. This is not her first stint posing for the swimsuit issue of Sports Illustrated, so she feels more relaxed around the crew.

"It's my third year I feel really relaxed and I just ... I wanted it to be really fun ... I don't know kinda like a party vibe on set, and I think that's exactly what it was," Graham continues.

Graham is the first American Plus-size model to grace the cover of the swimsuit issue of Sports Illustrated. She has also graced the covers of other publications including Vogue, Harper's Bazaar, Elle, and Glamour. She has also appeared in several campaigns for Levi's and has walked the catwalk during New York Fashion Week, recently at Christian Siriano's fashion show.