If you mean the one where theres a blonde girl with a pink dress, then the song is Save your kisses for me by Natasha Thomas but they must of changed the lyrics for the advert...
i cant find it too...but i know the song goes like what kind of love have you got...you should be home but you're not..i dont wanna believe that it's over now...lalala...i really like it but i caont find it on the net...this one is different from the touch of pink ad right?