CROONER Michael Buble – known for his Christmas hits – will appear as a checkout worker in Asda’s festive ad campaign.
He is in a series of commercials directed by Rita Ora’s new husband Taika Waititi and is tipped to sing.
TV insiders said the news marks a high in the annual battle between major retailers.
A source added: “The Christmas telly ad market has ballooned. Everyone wants to have the best in the game.
“John Lewis, Tesco, Sainsbury’s and all the others pull out all the stops.