As Jen Selter celebrated her birthday over the weekend, she posted a new photo that all her fans are going to enjoy.

Jen Selter Delivers Sad News In Tight Yoga Pants

On Monday, the social media model added the image on Twitter where she sits on a bed wearing a blue bikini. As she poses like a pinup girl, she gives a dashing smile for the camera while holding a number of balloons in her hand.

Jen Selter Shows Off Athletic Torso In Purple Sports Bra

At 22-years-old, Selter has accomplished a lot without having to put her name out there too much. The way she got famous was by posting photos of herself at the gym where her body slowly but surely turned into an iconic figure- especially in her behind, which became her most popular body part.

In a previous interview with Black Book, the fitness expert opened up on how proud she is of herself for making it as far as she did.

"I have worked hard and now I'm able to share my passion and motivate others to also love a fulfilling and healthy life," Selter said. "Anything is possible when you push yourself to achieve your goals."

Selter's work on Instagram and Twitter has led her to talk show appearances, magazine interviews and plenty of videos on what she does to get her body looking the way it does.

Tags: Jen Selter