Pregnant pop star Emma Bunton's big appetite is causing havoc during shooting of a new advert - her new lust for food is constantly halting filming. The former SPICE GIRL is filming an advert for British superstore giants Tesco, but admits she can't keep away from the food trailer. She says, "There's a trailer of lovely food, I can't help myself. I hear everybody shouting: 'Where's Emma?' and I come out with a guilty face and a full mouth." Bunton, 31, and boyfriend JADE JONES, 27, announced last month (26JAN07) they are expecting a baby together.