i was reginald dwight. when reginald dwight became elton john, then all hell let loose.toughest role you ever played ♪ >> reporter: his costumes range from the sublime to -- ♪ it's a little bit funny >> reporter: the donald duck outfit he once wore before half a million fans in central park. ♪ who makes possessions in a traveling show ♪ >> the button was so big when i sat on the peian oa yaewa piano hardly reach the keys. it was definitely a costume that needed a run through, and we didn't, but i loved it. i probably went a lot too fartl out of hand. but do i regret it? absolutely not. >> reporter: what he does regret, he says, are the deeper more serious things, like the moment in 1974 when he was introduced to cocaine. and you said that the first time you tried it, you actually threw up, and then you went back and asked for more? >> because i wanted to join in so much and be part of the gang, i went back and asked for another line. >> reporter: even though it was making you sick? >> i know. isn't that crazy? but being a drug addict is crazy. i so wish i had never taken