She joined Instagram in March 2012. And so far, she has amassed 1.3 million followers.
What makes Miss Jen Selter, 20, a front runner in the social media? Her bum. She apparently has the best bottom in the universe.
Her Instagram followers include fellow Instagram queen Rihanna and NBA star Amar'e Stoudemire, the New York Post reported.
"I'm recognised wherever I am," said the New York native. "I don't really go to public gyms any more just because it is a whole big scene when I'm there. I don't like being watched."
According to a report on The New Paper via AsiaOne, Miss Selter, who is 1.7m tall and weighs 50kg, has perfected the art of the "belfie" (bum+selfie).
Apart from her massive fan following on Instagram, she also has 505,000 likes on her Facebook page. On Twitter, she has 90,000 followers and counting, The Huffington Post reported.
"I don't really post a lot of face pictures. I mainly do body selfies. Not that I care what people think, but they don't care. They don't want to see my face," said Miss Selter, whose handle is @jenselter.
How did her posterior gain a cult following?
After finishing high school, she took some cosmetology classes while holding side gigs at a plastic surgeon's office and at a gym. Then, she started working out and - boom - her butt began ballooning.
She started posting workout selfies on Instagram. She noticed people were reposting her images without credit, so she reached out and asked to be tagged.
She began amassing 200,000 followers every month. When that hit half a million, she quit her gym job. Deals with New York City water company NY20 and nutrition supplement company Game Plan Nutrition, for which she is a spokesman, have helped her rake in "a lot more money than a graduate would be making".
She is not resting on her laurels. She plans to roll out her own line of workout wear and probably a gym chain.
But with fame comes negativity. She has been accused of going under the knife and has been called many unflattering things. However, Miss Selter is not perturbed.
"I've seen fake butts, and they're nicer. They look nothing like mine. I see it as a compliment."
However, she draws the line between posting pictures of her rear and saucy pictures. Said Miss Selter: "I'll never post a raunchy pic. There's a difference between a porn-site picture and gym wear or bikini wear. Everything's usually yoga pants."
Photos: Jen Selter / Instagram