Oprah discovered Dr. Mehmet Oz, a telegenic young cardiothoracic surgeon at New York City's Columbia University, after she appeared as a guest on a Discovery Health Channel show he hosted in 2003. A best-selling author who moonlights as an Esquire magazine columnist, Oz was a success well before Oprah anointed him her health expert. But after five years and 55 episodes with the Queen of Talk his tenure as a regular guest ended in May it's safe to say she boosted his star. In September 2009 Oz launched his own syndicated program, The Dr. Oz Show.
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