Watch Adam Lambert Get 'Evil in the Night' for Halloween 'X Factor Australia' Performance

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Adam Lambert

Adam Lambert celebrated Halloween with an "evil" performance, as he set fire to the stage of The X Factor Australia.

The American Idol season 8 runner-up went full-on freaky, donning a leather ensemble and swapping out his baby blues for possessed colored contacts for a performance of "Evil in the Night," from his album The Original High.

"I was in a Halloween fog," he said after his performance.

Lambert -- who recently portrayed Eddie in the Fox re-imagining of The Rocky Horror Picture Show -- is in the midst of his first season as a judge on the Australian singing competition.

Watch below: