He was introduced by Ryan Seacrest as the person who "truly set the bar for style and spectacle on this stage."
From there, one of the show's all-time favorites toned down his usual performance style, sat on a stool and gave viewers a stripped-down version of "Aftermath," a song with a vital message: You are not alone.
Starting now, fans can actually visit Lambert's official site and purchase the remixed version of this same single, with proceeds benefiting The Trevor Project. It's a worthwhile cause, sponsored by a talented artist.
What did you think of Adam's acoustic return to Idol?