The Marine mom and the karaoke King

Overview: A contestant from Las Vegas, Nev., tests his musical memory.

Overview: A property manager from Lafayette, La., and a musical church minister from Avondale, Ariz., compete.

Overview: An over-the-top thrill-seeker risks $1 million as she sings her way through some of the biggest hit songs of all time.

Overview: A new set of contestants competes.

Overview: A returning contestant faces two important decisions; a baker finds that remembering lyrics is not easy.

Overview: This season's youngest singer and a father with a falsetto take on the Million Dollar Challenge.

Overview: Two teachers try to take down 10 songs for $1 million.

Overview: A grocery worker tries to sing his way to some serious cheddar.

Overview: It's Dive Night!

Overview: A high school teacher and a mom from Vegas compete to win a million dollars

Overview: Moms rock out

Overview: Last chance to hit the right notes