SIR Elton John has auctioned off thousands of his outlandish stage costumes and designer clothes to aid his Elton John Aids Foundation - but there's a few items he'll never part with. Though he insists he'll never wear his Empire State Building outfit or the DONALD DUCK costume he once wore for a Central Park concert in New York again, they'll always be hanging in his closet. He says, "I'm very fond of the Donald Duck one because it just made me laugh. "I didn't have a rehearsal in how to get into it, so I was backstage at Central Park trying to get into it and I would have my arm through the leg hole and my leg through the armhole. I couldn't get into it for laughing." But Elton insists his days of dressing outrageously onstage are behind him. He adds, "I cannot go onstage without dressing up. It's a British thing, I think, because we grew up with pantomime and we grew up with a theatrical way. "But some of the things I wore were horrendous... I took it way too far for too long."