![](https://cdn.statically.io/img/imagez.tmz.com/image/ae/o/2015/02/18/ae8b157287ea5684b3542bf2766a2622_md.jpg)
Apparently, the apple bottom doesn't fall far from the tree.
Here's 21-year-old butt selfie goddess Jen Selter (right) posing with her 47-year-old mom Jill Selter (left) ... showing off their incredible mother-daughter physiques in tiny white bikinis.
Jen -- whose ass has a 5 million person following on Instagram -- says her mom hits the gym 4 to 5 times a week ... and clearly, it's paying off.
FYI -- Jen is also her mother's personal trainer ... so ... good work!
![Mama Selter and Jen's Sexy Photos](https://cdn.statically.io/img/imagez.tmz.com/image/e9/o/2015/02/18/e9cc4de3a6e5560986cae072be01cc51_md.jpg)
See also
![](https://cdn.statically.io/img/imagez.tmz.com/image/a4/16by9/2014/04/04/a4475c2b3b325436931c99f45e7c1194_xs.jpg)
Cincinnati Bengals Star -- Move Over Jen Selter ... There's a New Ass Queen In Town!!
![](https://cdn.statically.io/img/imagez.tmz.com/image/fa/16by9/2014/01/24/faad319602765ea0b6b3bc26da0f8b86_xs.jpg)
Jen Selter -- Killer Ass Is Full of Surprises
![](https://cdn.statically.io/img/imagez.tmz.com/image/7d/16by9/2015/02/10/7d3cfb3d40385dcf9c4205ba17be20cd_xs.jpg)
Vida Guerra -- Hey Derek Jeter ... I'm the Hottest GF You Ever Had
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