Atomic Kitten have become the latest celebs to try to get kids to drink more milk.
They'll be appearing on bus stops, milk cartons and magazines with "milk moustaches", to show that the white stuff is full of calcium and vitamin A.
Buffy
The ads are similar to ones seen in the US, featuring stars like Britney Spears and Buffy's Sarah Michelle Gellar.
Big Brother star Cameron is part of the campaign
Liz McLarnon said: "It's really important that kids grow up healthy and start making the right choices about what to put into their bodies from an early age."
The Kittens will be joined by Big Brother winner Cameron Stout in the ad campaign, which was organised by government agency the Milk Development Council.
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