Adam Lambert belted out the single "No Boundaries" during the American Idol finale. It's the winner's song, co-written by judge Kara DioGuardi.

Kris Allen opened the American Idol finale with his best performance of the night. He wowed the judges with "Ain't No Sunshine."

These three men made the semifinals of American Idol, season eight. But Danny Gokey's journey would end there.

Adam Lambert is seen here belting out "Cryin." What a perfect song choice for the American Idol finalist.

Kris Allen blew us away with this performance. You gotta find a video of him singing Kanye West's "Heartless."

Danny Gokey is seen here singing "You Are So Beautiful." The judges loved it.

The final four contestants rocked out during this results show number. Later, Allison Iraheta would be eliminated.

Slash mentored the final four contestants on American Idol. Never thought we'd see that.

Slash mentored the final four contestants on American Idol. Never thought we'd see that.

We were shocked that Adam Lambert landed in the bottom two with Matt Giraud. The singer himself was taken aback by it, too.

Matt Giraud has a solid run on American Idol. It came to an end before the final four was revealed.

Kris Allen is our second favorite finalist on season eight of American Idol. He's both talented and creative.