Jan. 17, 2007 | 09:30 AM EST

Diana: A Supreme Idol Guest

Diana: A Supreme Idol Guest | Diana Ross
Original dreamgirl Diana Ross made a surprise announcement during her appearance on The Late Show with David Letterman on Monday: She'll appear on this season's AI! "I'll mentor, and then I'll go on tour March and April (to support her new CD I Love You)," Ross told a surprised Letterman. If Ms. Ross's somewhat kooky interview on Letterman was a preview, we can only imagine that the Supreme diva's upcoming appearance on AI will give us plenty to talk about.