Clad in his finest biker gear, resident "Idol" rocker James Durbin traded lines with the veteran metal band's frontman Rob Halford, and you just knew he was dying inside because he's been on a mission to bring metal to "Idol" all season long. A great way to kick off the show.
7) Carrie Underwood & Lauren Alaina, "Before He Cheats"
"Idol's" glorious past meets its promising future. The season 4 champ and country star was paired up with this season's runner-up on one of her biggest hits, and still one of the greatest revenge fantasies ever put to song. No, Lauren's swagger and angst didn't even come close to Carrie's, but she was singing with her actual idol onstage for the first time -- how mad could she really be?
8) TLC & Lil Jon, "Scrubs" & "Waterfalls"
We're not sure why or how the surviving members of TLC ended up on the season finale, but we're not complaining -- it was a much-appreciated moment of nostalgia, seeing them back onstage and representing for their fallen sister with the help of some of the top "Idol" girls. RIP Left Eye.
9) Haley Reinhart & Tony Bennett, "Steppin' Out"
Hopefuly Haley embarks on a jazz career after "Idol," because between this and her incredible Charles Mingus duet with Casey Abrams midway through the season, she's clearly proven that she has the chops for it. She made a lovely duet partner for the great Tony Bennett and showed why she made it all the way to third place this season.
10) Bono, the Edge & the 'Spider-Man' Cast, "Turn Off the Dark"
The Broadway cast of "Spider-Man" traveled all the way to the West coast to bring their acrobatic (but no longer dangerous, we hope) stunts to "Idol," and composers Bono and the Edge were there to support them, performing a song from the musical that would fit right in on a new U2 album.
What was your favorite performance on the "American Idol" season finale? Share your pick in the comments.