Social media superstar Jen Selter posted a sexy new photo of her working progress on Instagram.

Jen Selter Shows Off Backside At Sunset

The photo that was posted on Saturday shows Selter in a double shot where she dons a blue sports bra with tight white pants. She arches her back a little with her behind flaunted along with her hard-core stomach muscles. She gives a mysterious look on her face with her eyes facing down, another random trademark she tends to do in her pictures.

She captioned the shot, "Don't make excuses, make improvements Tweet me @jenselter ! Follow back spree tomorrow loves"

Jen Selter Flaunts Her Abs In Green Bikini On Instagram

Selter occasionally has a "follow back spree" on Twitter so this is the time to keep in contact with her.

The 21-year-old has made a massive difference in the media considering that she became famous online. She started posting workout shots of herself at the gym where her body improved and people started noticing. While she developed progress throughout her figure, it's mainly her booty that became a sensation.

On New Year's Eve, she posted an image of herself at the gym where she thanked her fans for all of their support.

"For me, 2014 was filled with both challenges and amazing experiences," she wrote. "It has been a wild and unexpected ride that turned out to be one of the best years of my life. And it's all thanks to you! I couldn't have done any of it without you- I am so grateful for all of my fans and your support."

Tags: Jen Selter