Zedd met Selena Gomez on the way to the toilet.

Speaking about their chance meeting, he said: "It was about as random as it gets. I had the day off... and I decided to go buy stuff for my house because I just moved, so I have an empty house, and I had to pee.

"I had my engineer with me, so I was like, 'I hope they have a bathroom.' He was like, 'Just go to the studio over there,' which was across the street from my studio. He's like, 'They have a bathroom, just go and use that.'

"So I walk in, and John, the head of our label, who had just signed Selena, was there. He was like, 'Have you ever met Selena?' That was literally the next thing he said."

After being introduced by the head of their label, Zedd and the 22-year-old singer hit it off instantly and quickly jumped into the studio together to work on 'I Want You To Know' the week later.

He added to Los Angeles' 97.1 AMP: "So he introduced me to her, and I was like, 'Hey, she's cool, maybe we should make a song together.' And then like a week later, we start working on a song."