Days of Our Lives vet Alison Sweeney is replacing Caroline Rhea as host of NBC's The Biggest Loser, Variety is reporting. Rhea, who has fronted the weight-loss compeition since Day 1, has moved on "to pursue other interests," says the network. The hiring of Sweeney, meanwhile, says exec producer Ben Silverman, "will bring not only a great fresh face, but [also] a huge, loyal fan base." Heck, based just on the evil twins and illegitimate children who may start tuning in, the ratings could go up 10 percent.