Britney Spears' next single will be released in May.

The Iggy Azalea collaboration 'Pretty Girls' has been mooted for a number of months after the duo confirmed collaboration plans in interviews.

A rep for Spears has now confirmed that the track will be released on May 5.

The US star's Piece of Me residency meanwhile has also just been named as the best show in Las Vegas.

The hit-strewn gig, which has been running since 2013, was voted as Best Overall Show by readers of the Las Vegas Review Journal.

It was also named as the Best Bachelorette Party.

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Watch Britney Spears perform in Vegas below: