It's many a girl's dream to share a sexy slow dance with pop megastar Justin Bieber.

For one senior citizen in Queenstown, that dream just came true.

Bieber revealed the moment in an unusual Instagram video post showing him dancing topless with an elderly woman while others look on.

Justin Bieber dances with a woman in a Queenstown bar. Photo/Instagram
Justin Bieber dances with a woman in a Queenstown bar. Photo/Instagram

The 23-year-old singer logged on to his social media account to share the footage of him bare-chested as he leads the senior citizen by the hand on a dancefloor at The Blue Door in Arrowtown.

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The Love Yourself hitmaker and the lucky lady are seen laughing and joking and Bieber ends their dance by planting a sweet kiss on her cheek and giving her a warm hug.

Justin Bieber hugs a woman in a Queenstown bar after sharing a dance with her. Photo/Instagram
Justin Bieber hugs a woman in a Queenstown bar after sharing a dance with her. Photo/Instagram

In the black and white clip - which is soundtracked by Jay Z and Kanye West's 2011 hit track N***as in Paris - an older man and woman are looking on at the two from the sidelines with broad smiles.

He was also pictured doing shots at the bar, smiling and laughing with a waitress.

Justin Bieber enjoys a drink at The Blue Door. Photo: AKM-GSI/Backgrid
Justin Bieber enjoys a drink at The Blue Door. Photo: AKM-GSI/Backgrid
Justin Bieber talks to a waitress at Queenstown Bar The Blue Door. Photo: AKM-GSI/Backgrid
Justin Bieber talks to a waitress at Queenstown Bar The Blue Door. Photo: AKM-GSI/Backgrid
Justin Bieber enjoys a drink at The Blue Door in Arrowtown. Photo: AKM-GSI/Backgrid
Justin Bieber enjoys a drink at The Blue Door in Arrowtown. Photo: AKM-GSI/Backgrid
Justin Bieber sits at the bar at The Blue Door in Arrowtown. Photo: AKM-GSI/Backgrid
Justin Bieber sits at the bar at The Blue Door in Arrowtown. Photo: AKM-GSI/Backgrid
Justin Bieber sits at the bar at The Blue Door in Arrowtown. Photo: AKM-GSI/Backgrid
Justin Bieber sits at the bar at The Blue Door in Arrowtown. Photo: AKM-GSI/Backgrid

The musician failed to caption his Instagram posts, something which has kept his green-eyed fans guessing as to who the mature mystery woman is.

The co-owner of The Blue Door, Nicholas Piper, told the Herald he wasn't sure who she was, but suggested Bieber might have been out on the wrong night.

"I wasn't there," said Piper. "It's a pity he wasn't there tonight. Wednesday night we have a band there and the place takes off. I go down, and I'm 68."

Bieber has been in Queenstown holidaying since his performance in Auckland last weekend, receiving mixed reviews for his show at Mt Smart Stadium.

Justin Bieber arrives at Queenstown Airport.
Justin Bieber arrives at Queenstown Airport.

He was photographed taking part in the Shotover jet as well as getting takeaways at Ferg's Burger.

Justin Bieber enjoys a burger and ice cream at Ferg's Burgers in Queenstown.
Justin Bieber enjoys a burger and ice cream at Ferg's Burgers in Queenstown.

He's set to leave New Zealand and jet off to South America later in the week in time to make it to perform at the Estadio Nacional in Chile on Thursday as part of his Purpose World Tour.

He'll then head to Brazil and Puerto Rico, before he travels to Europe to wow crowds and end his tour in America.

The Canadian pop star is not shy when it comes to posing shirtless as he also took to the photo-sharing site earlier in the day to show off his new body art.

Alongside two videos of Bieber laying back to show off his toned tattooed torso, which was uploaded to his Instagram Story and lasts for 24 hours on his page, he zoomed in to an inking of a giant eagle with the words 'Son of God' emblazoned on his stomach, as well as a bear on his chest next to a set of roman numerals and a crucifix engraving.