Shania Twain is the only country artist to be included in Forbes magazine's annual list of the Celebrity 100. Madonna, who came in at No. 8 on the overall list, was top ranked among 10 music acts. Twain landed at No. 29 on the Celebrity 100 and at No. 5 on the musicians' list -- behind Madonna, Elton John, P Diddy and Metallica but ahead of Rod Stewart, Bette Midler, Prince, the Eagles and Van Halen. Heading the big list, though, was Oprah Winfrey.