Mehmet Oz

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.
Rachael Ray

Chances are Rachael Ray would have gone far on her tasty recipes and perky personality alone. But the Oprah bump sure didn’t hurt. In 2005 Winfrey plucked the 30-minute-meal maven from the Food Network and signed her to host a daytime talk show. When Rachael Raydebuted in 2006, Oprah invited the “super cook” onto her own show to woo viewers. It worked: speculation now abounds that Ray might end up the chosen heir to the Queen of Talk’s throne. Upon learning that her mentor would end her show, Ray was typically bubbly. “I am going to enjoy every episode between now and 2011,” she said. “There will only ever be one Oprah!”

























