"I'm Alive"
"David went to two songs that most people haven't heard before," Diamond says. "I got goosebumps."

Cook rocks "I'm Alive" and will score points for picking a song that few will be able to compare to the original because few know it.

Brooke White plays guitar on "I'm a Believer." It initially seems too low for her, but she gets better as the song goes on.