Exterminate!" is the title of a song recorded by the German band Snap! featuring Niki Haris. Niki Haris (born April 17, 1962) is an American actress, dancer, and singer of pop, R&B, dance music and jazz, perhaps best known for having been one of Madonna's backing vocalists from 1987 to 2001,Haris was a friend and backing vocalist for Madonna and began working with Madonna in her Who's That Girl Tour. She appeared in the movie Truth or Dare, a documentary of backstage and onstage footage recorded during the Blond Ambition Tour. .