Jen Selter (@jenselter) Instagram photos - InstaLife

Jen Selter, 21, became famous when she began posting photos of her toned backside on Instagram back in May 2012. Since then she — or should we say, her butt — has raked in more than 6.1 million followers, and Selter has become an international celebrity and fitness spokesmodel. But, it wasn’t another enviable photo of her derrière that caught the attention of millions this week; it was a snap of her mom, more importantly her mom’s body. At 47, Jill Selter has an almost identical body to her daughter 26 years her junior and credits this transformation to hard work and personal training by her daughter.