Procter & Gamble announced on Wednesday that Alison Sweeney — "The Biggest Loser" host, author of "The Mommy Diet" and "Days of our Lives" star — has partnered with the Crest and Oral-B brands to help launch the "Life Opens Up Project," a program that encourages individuals to share their personal stories showcasing how their healthy mouths have played a role in shaping who they are today.