American Idol Michael Johns dead at 35

Michael Johns, the Perth singer who charmed tens of millions of viewers on hit US TV show American Idol, has died. He was 35.

The charismatic performer is believed to have died from a blood clot in his ankle, according to The Hollywood Reporter.

"It is with a heavy heart and inconsolable sadness that we confirm the passing of our friend Michael Johns," the administrator of his website tweeted on Saturday.

Johns impressed the notoriously tough English judge Simon Cowell when he appeared as a contestant on the top-rating show in 2008.

Johns made it to the finals, finishing eighth, despite controversy.

American Idol have posted a statement on their Facebook page remembering Johns as an incredible talent, sharing their sadness at his passing.

"He was a part of our American Idol family and he will be truly missed. Our hearts and prayers go out to his family and friends during this difficult time," it said.

Friends and fans have shared their condolences on social media, all expressing shock at the sudden death of Johns.

Johns placed 8th in the 2008 season of American Idol, recording the album, "Hold Back My Heart" in 2009.