Little Mix are the latest to take part in Matalan's Beanie vs Bobble Alder Hey Christmas Campaign.
The girls join a long list of celebrities - including Britney Spears, Kylie Minogue, Will Ferrell - in supporting the campaign which centres around knitted hats and asks the question: are you a Beanie or a Bobble?
When a hat is purchased (kid's hats are priced at £4 and adult's priced at £8), all proceeds go to the Alder Hey Children's Charity.
Twitter users have also been sharing their support (and their hat preference) using the hashtags #ImABeanie or #ImABobble.
Join in and tweet us what you prefer @GlamourMagUK
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