HER face might not be familiar – but with more than 1.7 million fans on Instagram Jen Selter may have the world’s most famous bottom. Jen, 20, amassed the huge following since she began posting pictures of herself working out on the photo-sharing site in March 2012. Since then she has become an online hit thanks to her most famous butt. She regularly notches up 80,000 likes per post with pics of her yoga pants and sports bra. And the New Yorker even boasts global megastar Rihanna as a follower. To achieve the body that has her Instagram and Facebook pages going into meltdown, Jen puts herself through her paces each day. Her daily workout routine of around two hours includes cardio, squats and bodyweight exercises to sculpt her famous behind.