This is a still from the American Idol Season 21 premiere on ABC.

This is a still of Idol Across America's dates for 2023.

Adam Lambert was made for rock 'n roll. He owned the stage during a rendition of "Whole Lotta Love" by Aerosmith.

This would prove to be Allison Iraheta's final performance on American Idol. She was voted off prior to the announcement of the final three contestants on season eight.

Here's a shot of Adam Lambert, courtesy of the American Idol semifinals. He's singing the Aerosmith classic "Cryin."

Danny Gokey had to settle for third place on season eight of American Idol. Far from a shabby result. He should be proud.

Kris Allen flew under the radar for most of season eight. But as time went by, there was no ignoring the talent this American Idol finalist possessed.

This was Adam Lambert's last chance to wow the viewers. He performed the Kara DioGuardi-written song, "No Boundaries."

Kris Allen is seen here during the American Idol finale. Like Adam Lambert, he had to sing "No Boundaries" for his final performance.

Kris Allen put on quite a show during the American Idol finale. It helped net him the season eight crown.

It was down to Kris Allen and Adam Lambert on season eight of American Idol. And the former took home the title.

This performance may have won American Idol for Kris Allen. It's a shot of him singing Kanye West's "Heartless."