13. Tyra Banks
Supermodel and fashion mogul Tyra Banks made her Oprah Show debut in 1996—her first of 16 appearances! Over the years, Tyra has shared fabulous fashion tips, made over deserving teens and helped moms who needed little pick-me-ups. Together Oprah and Tyra also tackled tough subjects facing young women, like teen dating violence, sibling rivalry and broken hearts.