Diana Ross was the first modern pop diva, a benchmark of haughty elegance that laid the path for Whitney, Mariah, and Christina. Her front-and-center attitude could be trying; she constantly overshadowed fellow Supremes Flo Ballard and Mary Wilson and demanded top billing in the trio's final years. Still, you couldn't argue with the results (12 number-one singles) or with her voice. Her role as one of soul's finest singers has rarely been questioned. Her solo career yielded more hits, duets with Marvin Gaye and Lionel Richie, and a few movie roles. Ross comes to town with her tour, which promises an overview of her 50-year career as well as extravagant costume changes and stage sets.