Over the years Oprah has had a number of experts appear on the show, some more than others. When the experts turn into Oprah's "friends" the added benefits roll in, including radio shows, regular Oprah Show appearances, their own talk show, contributions to O Magazine and O at Home, their books becoming bestsellers and more.

Tuesdays were once incredibly successful with Dr. Phil, so why not with Dr. Oz? Of all the current experts that appear regularly on the program, Dr. Oz is my favorite - not only is he charming and down to earth, but knowledgeable beyond compare. Who is your favorite Oprah friend?