Britney Spears has opened up on how her recent collaboration with Iggy Azalea came about.

The Australian rapper revealed at the end of last year that she has been working with the pop icon on a "fun" new single.

Speaking to Extra, Spears said that she was desperate to work with Azalea after seeing one of her videos on television.

The singer said: "I saw her song on TV and I was like a kid in a candy store, I was like, I love Iggy, I love that video, I want to work with her.

"It was really weird, because a week after that her manager was like, 'She's a huge fan of yours'. I was like, 'Let's do something together', so it worked out."

Azalea meanwhile rubbished rumours in February that the single had been dropped, saying on Twitter:

"Insiders are always really OUTsiders with misinformation. This couldn't be further from the truth. Get ready.

"There are pretty epic plans underway for the song that's all I'll say."

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