Sia "didn't know" who Harry Styles was when he flirted with her

Speaking to Sirius XM's 'Morning Mash Up' show, she said: "He was just this young, cute, little charismatic person.

"I didn't know at the time who he was.

"He's super flirtatious and I realised who he was and I introduced myself to him and he was like 'Oh, I know'."

The 'Chandelier' hitmaker previously admitted Harry, 26, had left her feeling "dizzy" thanks to his "smooth moves".

She said recently: "That little chap has some moves because he's got swag. He got me when I was like 35 or something, and he was 21.

"I've heard it from a lot of girls. He's got the smooth moves because he's a charming young chappy. But certainly, I felt like I went bright red."

Sia - who adopted two teenagers last year - recently admitted she finds producer Diplo "super duper hot" and offered him casual sex, but insisted she doesn't want a relationship.

She said: "Much of our relationship is just being spent trying not to have sex, so that we wouldn't ruin our business relationship - because [Diplo is] super duper hot.

"This year I wrote him a text and I said, 'Hey, listen, you're like one of five people that I'm sexually attracted to and now that I've decided to be single for the rest of my life, and I just adopted a son, I don't have time for a relationship. If you're interested in some no-strings sex, then hit me up.' "