The feathers! The baubles! The chainmail chaps! Once upon a time, Bob Mackie was glamour. From The Carol Burnett Show to 30 years of Tina Turner's leg-loving stage looks to Cher's most unforgettably outre ensembles, Mackie's garnered a client roster that reads like a who's who of twentieth-century showbiz. He's not as ubiquitous as he once was, but he still creates made-to-order couture and a mass-market line called Wearable Art, available through QVC. A mini-Mackie revival is brewing, with celebs like Eva Longoria Parker and Jada Pinkett Smith pulling gowns from the vaults and turning them out on the red carpet-bejeweled loincloths and mohawk headpieces not included.