Cher Lloyd loves to experiment with her hair.

The singer, 19 - who's rocked everything from a cute curls to bright red bangs - has changed her look again, this time swapping the tousled bob she sported at Wireless Festival for retro-inspired rolls.

This time it wasn't a surprise as Cher recently Tweeted that'd she spent time in a swanky salon updating her locks with extensions for a TV appearance in the US. 

'Thank you @inanchlondon for the lovely hair extensions!! I'm gonna be showing them off to the whole of the US on America's Got Talent...,' she wrote.

The X Factor star completed her American transformation with a flirty zig-zag print skater dress, trendy hi-top trainers and bold make-up.

WATCH Cher Lloyd's amazing performance of Want U Back on America's Got Talent below...

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