DOES ANYONE know thiss song???!?

its a soft tune, its a boy and girl alternating, like the moldy peaches band. during the chorus theres like a melody of " oh oh oh oh-oh oh oh oh-oh-oh-oh oh oh oh oh-oh oh. the girl sings it in harmony and the boy sings the melody its very pretty. i dont know the title/artist. so if anybody has any ideas on what this song is pleaseeeee respond!