Diana Ross is 63 years old and looks exactly as she did the night she performed in a lightning and rain storm in Central Park--especially the hair, which is fabulous---back in 1983. Miss Ross was in the Hamptons this past weekend for a big Barton G. blowout for the Diabetes Research Institute. Apparently An Evening Under the Stars, hosted by Jill and Cliff Viner originally at their Quogue estate was such a hot ticket, it had to be moved to another location. Our spies tell us that Miss Ross made several gown changes and "delivered the goods bigtime." If she didn't change gowns at least six times, we'd be worried. At any rate, she looks outstanding. We don't know where Michael Jackson's surgeon dropped the knife, but perhaps Ross could share hers with him, Priscilla Presley who is The Joker's doppelganger, and just about every other celebrity resembling rubbery blow up dolls.