Internet celebrity/fitness model Jen Selter has recently posted a stunning mirror image photo of herself on Instagram, and like her previous posts, it's nothing short of amazing. Follow Jen Selter on Instagram to see more gorgeous pictures and her fitness tips.

Selter has become a famous social media celebrity for sharing her workout routines and exercise secrets on Instagram. She now has almost four million followers, and has received nicknames such as "ass Internet sensation," noted by TMZ, and "world's best butt." Most of the time, Selter takes photos of herself in her signature move called "Seltering," which is a modified squat pose that showcases her well-praised bottom.

Although Selter did not do her signature pose in her latest Instagram snap, she still managed to charm millions of her followers with her well-defined body. The image, which came with the hashtag #DoubleTrouble, is an edited mirror photo of Selter wearing a striking pink bikini and looking more beautiful and fit than ever. It has been noted that the last time that Selter posted a photo with a similar style was four weeks ago, where she wore a blue bikini while hanging out by the pool. 

Selter has claimed to have taught herself to shape the body she is famous for today. In an interview with "Good Morning America" earlier this year, Selter revealed that she was self-trained. "I would just follow the trainers and when they were training someone I was like, 'oh, what does that do?'"

In another interview with The Huffington Post, Jen shared some of her secrets in staying fit and healthy. When asked about her typical day of waiting when she's not exercising, it was revealed that she believes having breakfast.

"A typical day for me starts with either oatmeal, or egg whites and toast for breakfast. I truly believe breakfast is the most important meal. It provides the energy I need to keep me going for hours and keep me as productive as possible!" she added. 

Meanwhile, it was announced in May that Selter will be serving on the New York Post as a fitness columnist. She started the gig with a swimwear shoot. Aptly called "Kicking Butt," Selter's column will become a motivation to everyone who wish to get their confidence up. 

"It's very exciting to be a New York Post columnist, Being a part of New York and being able to inspire and motivate people through my words and photos is an amazing opportunity," she said about the opportunity.