Olly Murs and Demi Lovato have recorded an acoustic version of their single 'Up'.

The duo previously collaborated on the song for Murs' recently released album 'Never Been Better'.

Ahead of the track's UK release on December 21 the pair have recorded an acoustic video.

It sees Murs and Lovato running through the song with a band.

The Brit commented on Twitter: "This was serious giggles! Check it out me & miss @ddlovato doing #upliveacoustic."

'Never Been Better' meanwhile reached No.1 when it was released in November.

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Watch the 'Up' acoustic video below: