As the current 'X Factor' winners, Little Mix will always have those critics thinking their success has less to do with musical talent than with Simon Cowell's whimsy, and Sony Music's deep pockets.

So, in what could prove the doubters wrong, the girl group have performed their song 'DNA' acapella style, with no hint of supporting instruments or a backing track. Watch them in action above, and let us know - what are your thoughts on their skills?

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Can Little Mix sing?

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