Cast
Kim LyonsTrainer
Kim Lyons was 34 in The Biggest Loser - Season 4 - Viewers Choose the Challenge (Episode 12). Birthday: Sat, May 05 1973
Bob HarperTrainer
Bob Harper was 42 in The Biggest Loser - Season 4 - Viewers Choose the Challenge (Episode 12). Birthday: Wed, Aug 18 1965
Alison SweeneyHost
Alison Sweeney was 31 in The Biggest Loser - Season 4 - Viewers Choose the Challenge (Episode 12). Birthday: Sun, Sep 19 1976
Jillian MichaelsTrainer
Jillian Michaels was 33 in The Biggest Loser - Season 4 - Viewers Choose the Challenge (Episode 12). Birthday: Mon, Feb 18 1974
Kim Lyons
Bob Harper
Alison Sweeney
Jillian Michaels