Would you believe one young woman has more Instagram followers than supermodel Gisele Bundchen?  Twenty-year-old Jen Selter has more than 1.8 million followers and growing, and it's all thanks to one major asset—her butt.

By posting photos of her behind in yoga pants, she has amassed a worldwide following. She can't even leave the gym without fans approaching her.

Even Rihanna, who's known for her impressive derriere, follows Selter on Instagram. One revealing photo has 135,000 likes with comments like "So perfect" and "Wow."

Watch How Selter Works Out And Talks About Her Fame

She took INSIDE EDITION to David Barton Gym in New York City to show us how she gets her butt in shape with squats, steps, and stairs. She even has her own move called “Seltering,” where she climbs up two parallel walls.

Selter has got it all right, no ifs, ands, or buts about it!