SIR Elton John has expressed dismay at comments made by a Northern Irish politician about HIV.
On Tuesday, Democratic Unionist Trevor Clarke said he did not know heterosexual people could contract the virus until the facts were explained by a charity last year.
Sir Elton, who is due to play a gig in Belfast on Friday, said: "What planet are you on?"
During an appearance on the Victoria Derbyshire programme, Sir Elton agreed that many 1980s misconceptions about HIV still exist.
When asked to remark on a survey that found a third of people in the UK believed HIV could be contracted through sharing a toothbrush, the singer replied: "I'm not surprised.
"A Northern Ireland politician said the other day he didn't know that heterosexual people could get Aids, or HIV.
"So, it's like: 'What planet are you living on?'"
Sir Elton, whose Aids Foundation, funds testing programmes across the world, did not refer to Mr Clarke by name.