Singer Sir Elton John marked World AIDS Day by lighting the Sydney Opera House with mural projections to commemorate the day.

At the event, Sir Elton remembered the death of Queen frontman Freddie Mercury from the disease.

“My friend Freddie Mercury 20 years ago two weeks ago died. And I saw him struggle with what was the appalling Kaposis and painful, hideous things to look at. Two years on, he would have been still alive. That's the cruelty of this disease. We lost so many people so quickly and then we developed drugs that kept people alive,” he said.

(Related: Obama looking forward to an AIDS-free generation.)

The British singer's Elton John AIDS Foundation was founded in 1992 and has raised over $220 million in support of projects in 55 countries around the world.

Sir Elton said he believed the 30 year battle against AIDS was coming to an end.

“We've got this disease really by the scruff of the neck. But we cannot loosen that grip we have on it. If governments start backing out and stop funding, the epidemic will start to balloon again.”

He added that removing the stigma associated with the disease was imperative to beating it.

“This is not a faggots' fucking disease anymore. This is a worldwide disease that affects everybody.”

“Let's get rid of this disgusting stigma and get these people who are such fascists, such idiots, and such assholes to understand that people have a right to live with dignity.”