Jen has gained millions of fans with her sexy gym selfies

Kim Kardashian has some competition in the sexy bum stakes.

Fitness fanatic Jen Selter has amassed over 1,745,000 Instagram fans since she started posting hot gym pictures in 2012 – and her sizeable derrière is now almost as recognisable as Kim‘s.

‘When I was younger I was never this toned. But when I started work at a gym in my senior year of high school, I started working out with a lot of the trainers,’ says Jen, 20.

‘Right away I saw a transformation in my body – toned arms, legs and stomach – then my butt started to become more shapely.

‘As my body began changing more people started reposting my pictures. Then my Instagram blew up.’

Thanks to her internet fame, Jen – who ‘giggles’ at those who reckon she’s had buttock implants – has been able to quit her job and is now being paid to front campaigns.

Despite being regularly compared to Kim, 33, she doesn’t see the similarity and says she prefers the bodies of stars such as Rihanna and Miranda Kerr.

‘People might compare me and Kim Kardashian but I would never put us together as we’re different shapes,’ Jen tells The Sun.

‘I think she’s a bit larger than me.’

SEE PICTURES Kim Kardashian and Kanye West: A love story in pictures

SEE PICTURES Kim Kardashian and her family’s life in pictures

SEE PICTURES Kim Kardashian Style File: The TV star and her fashion looks

Anna Duff