Oprah: Where Are They Now?

Biggest Loser Ali Vincent, '80s Pop Star Samantha Fox,& Smart Guy's Tahj Mowry (8x8)

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Updates on Ali Vincent, who won 2008's "The Biggest Loser"; British pop star and pinup model Samantha Fox; and Tahj Mowry, younger brother of Tia and Tamera Mowry.