It is being labelled the best photobomb of all time.

A Melbourne teenager named Valentina just wanted a selfie at a Beyonce concert – but instead she found her pop idol posing for the camera behind her.

Having made her way to the front of the stage, the 15-year-old turned her back to snap the moment.

Just as she did so Beyonce spotted the camera and leaned in with a grin to make it a picture to treasure.

Writing on her Tumblr on Monday, Valentina told her followers about the unforgettable moment during the concert at Rod Laver Arena.

“OMG OMG OMG I CANT BELIEVE IT HAPPENED TO ME,” she wrote.

“It was such a blur i just remember her bending down to me and my friend and i just turned for the photo and wowoowow it was the best moment ever like she posed its crazy i wasn’t even expecting her to look at my phone or notice me in the crowd.”

The picture soon went viral, with envious fans reposting it online. A YouTube video of the performance where it occurred has also been posted online.

Beyonce caused a stir last week in the Melbourne suburb of Brunswick when fans spotted her posing for a photo shoot outside an old weatherboard home wearing just a white leotard and white fur coat.

The Single Ladies is currently in the midst of her The Mrs Carter Show world tour.

As she tours the globe the 32-year-old is accompanied by her daughter with Jay Z, Blue Ivy.

She heads to Perth to finish the Aussie tour with two sold out shows at Perth Arena on November 8 and 9.

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Source: Tampa Bay Times