You've heard her mentioned on "Will & Grace," now you'll see her ON "Will & Grace." Cher --ohmigod! -- will appear in a cameo on the Emmy-winning NBC sitcom in an episode called "Gypsies, Tramps and Weeds" and scheduled to air on Nov. 16. (Cher once had a hit song called "Gypsies, Tramps and Thieves.") The diva's stint was filmed this week, says the Associated Press, and her appearance is tied to the infatuation that the show's character Jack (Emmy winner Sean Hayes) has with her. In other news about Cher, 54, the house she once owned in Aspen, Colo., a rambling Spanish adobe-looking mountain home, is back on the market, reports Friday's Wall Street Journal. Among the amenities in the 8,863-sq.-ft. manse: 12-foot, 100-year-old Peruvian entry doors, five fireplaces, a greenhouse and a heated four-car garage. And it's all yours for $8.75 million.