Anna Kournikova To Join “The Biggest Loser”Anna Kournikova To Join “The Biggest Loser”Former tennis player Anna Kournikova has a new gig. Kournikova will replace Jillian Michaels, as a celebrity trainer, on NBC's "The Biggest Loser." The heraldsun.com has the story, below.Steve PeloquinSteve Peloquin