Fifth Harmony have debuted their latest music video.

The girl group are unleashing the track 'Sledgehammer' as their debut UK single on December 7.

Its video has now been premiered and it sees the quintet perform in front of a number of different classy backgrounds.

The group found fame on the 2012 series of the US X Factor and singer Ally Brooke Hernandez recently said their rise to prominence has been "crazy".

She said: "I’m 21 now but when we started out I was 18. It was kind of thing where once you went, you went. It was zero to a hundred real quick! It was pretty intense.

"I think it really helps that throughout all of them, throughout the pressures and the high and low of the competition, we all had each-other."

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