'Your Song' icon Sir Elton John has revealed the reason why he waited for so long to talk about his sexuality.

In a new U.S. TV interview with 'Today' presenter Matt Lauer, he explained that despite coming out as bisexual in the Rolling Stone magazine back in 1976 he finally felt comfortable with the 'gay' label in 1988 following his divorce from German woman Renate Blauel in '84:

"Nobody asked me. When (journalist) Cliff Jahr asked me in Rolling Stone, 'I'm gonna ask you a question, but if you don't want to answer it, I'm gonna turn the tape recorder off.' And I said, 'You're gonna ask me if I'm gay or not.' And he said, 'How did you know that?'"

"I said, '"I've been waiting for people to ask me this. It's not exactly a secret. I live with my manager. I'm openly gay outside. I don't have a girlfriend. And nobody's ever actually out -- I just thought it was common knowledge.'"

Watch Sir Elton's special message to ESA, André and the crew of the ISS to celebrate the 40th anniversary of his single 'Rocket Man' below: