American girl band Fifth Harmony are giving their fans a preview of the upcoming video for their latest single 'Sledgehammer'. 

In a series of short clips, the Fifth Harmony girls - Ally Brooke Hernandez, Normani Hamilton, Dinah Jane Hansen, Camila Cabello, and Lauren Jauregui - can be seen wearing brightly-coloured billowing dresses, another set of matching white outfits and performing in silhouette (see video below). 

Speaking to Billboard about 'Sledgehammer' Camila Cabello said: 

"It’s cool because we’ve never released a single that’s about love - a happy, cute love song... It’s about being with the person you like and feeling the beating of the heartbeat that beats like a sledgehammer." 

The full video for 'Sledgehammer' is set to premiere next week on November 25.  

'Sledgehammer' is the second single taken from Fifth Harmony's debut album, 'Reflection', which is due to be released on January 27. 

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Watch preview clips and a behind-the-scenes interview from Fifth Harmony's 'Sledgehammer' shoot: