Justin Bieber isn't cosying up to Kourtney Kardashian in new Instagram photo – we know who the girl is!

Ainhoa Barcelona

Justin Bieber almost caused an Instagram meltown on Sunday after he posted a picture of himself cosying up to a mystery lady. The sticking point? His cheeky caption: "Lord knows" which fans took to be a reference to Scott Disick – and confirmation that the woman in the snap was indeed Kourtney Kardashian.

The pair are currently the centre of romance reports; they are said to have enjoyed a few casual dates and have been spotted partying and leaving nightclubs in the early hours of the morning.

But despite Justin's apparent reference to the self-styled Lord Disick, it seems the 21-year-old was just using the rumours to have some fun on social media with his fans.

Lord knows

A photo posted by Justin Bieber (@justinbieber) on

Fans speculated that the mystery girl in the picture is Kourtney Kardashian

The racy photo showed Justin leaning over a woman perched on a slick Audi, showing off her enviable legs. With the top half of her body and her face hidden from view, speculation was rife that the girl was 36-year-old Kourtney.

However, the mystery woman is not the Keeping Up with the Kardashians beauty – as revealed by Instagram user JBC, who appears to have captured the moment Justin set up his prank picture.

A photo posted by @flatlinebling on

The girl actually appears to be model Jasmine Villanueva

JBC, who uses the handle "flatlinebling", posted a snap of the What Do You Mean? singer being photographed by a friend in front of the same black car that appears in the contraversial picture. But the angle shows the woman to be not in fact Kourtney, as revealed by her blonde hair.

It's been widely speculated by those in the know that the pretty blonde is in fact Los Angeles-based model Jasmine Villanueva, a friend who Justin recruited to help him with his ruse.

Trouble ✖️@bryant

A photo posted by Jasmine Villanueva (@jasminevilll) on

Jasmine is an LA-based model who has been spotted hanging out with Justin

According to a recent report by Gossip Cop, Justin and Kourtney have been spending more and more time together. The rumours were strengthened when the pair were photographed at The Nice Guy in West Hollywood, Los Angeles on Friday.

Justin, Kourtney and a group of friends were seen hanging out at the nightclub, and then heading to a karaoke bar where the mum-of-three left before the singer. Kourtney is then said to have checked into the Montage Beverly Hills hotel, where Justin likes to stay, and was later photographed leaving at 4am.

The report went on to say that Justin and Kourtney first sparked dating rumours back in October, when they were seen again enjoying dinner at The Nice Guy.

More on: