Demi Lovato has put Iggy Azalea and Eminem at the top of her collaboration wish list.

The US star told Capital FM this week that the two rap artists, along with Kelly Clarkson, are dream duets.

She said: "I also am obsessed with Kelly Clarkson, she's been my idol. I'd love to work with Eminem and Iggy Azalea."

Lovato had earlier confirmed that there are plans afoot for herself and Ed Sheeran to record a song together.

The American said: "We've talked about it before. It's hard because he lives here and I'm in LA and we're so busy too.

"But I'm such a huge fan of his music. I know every word [to 'x'], it's embarrassing."

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Watch Demi Lovato being interviewed below: