Lauren Alaina & Scotty McCreery Battle in Triple-Round 'American Idol' Face-Off

The voting is now open! The youngest "American Idol" finalists ever (Scotty McCreery, 17, and Lauren Alaina, 16) lit up the stage at Nokia Theatre L.A. Live on Tuesday in their fight for the season 10 crown.

The two teens entered the stage holding hands, but they set their friendship aside once they touched the microphone.

"I'm here, I'm ready to sing and I'm fine," said Lauren, who had problems with her voice prior to the taping.

Lauren put all doubts aside when she blew away the judges with her rendition of Carrie Underwood's "Flat on the Floor," following Scotty's version of "Gone" by Montgomery Gentry.

In the second round, the contestants sang tunes recommended for them by their own music idols. George Straight chose his own song "Check Yes or No" for Scotty, while Lauren's hero Carrie Underwood picked Pam Tillis' "Maybe It Was Memphis" for the young songstress.

Round three unveiled the singles that would be released by either contestant if they win the "American Idol" title.

Scotty encapsulated his journey through the singing competition, belting out "I Love You This Big," while Lauren almost brought the crowd to tears with a tribute to her mom called "Like My Mother Does."

Season 7 winner David Cook closed the show by singing the '80s hit "Don't Forget About Me."

Tune in to "American Idol" on FOX tomorrow to see who will win this season.