Four new contestants are put to the test.

Four new contestants are put to the test in the first part of a two-hour episode.

Four new contestants are put to the test in the second part of a two-hour episode.

Four new contestants are put to the test in the first part of the two-hour season finale.

TV Drama 'House' stars Omar Epps and Kal Penn go medical to musical to face off in game one. In game two, Laura, a project manager from Oregon plays against Symone, an operations manager from Minnesota.

Four new contestants are welcomed to the stage, where their musical abilities are put to the test.

Contestants battle for the prize in this series premiere episode.

The season premiere episode features TV personality/actress/singer Kelly Osbourne, playing for the Sharon Osbourne Colon Cancer Program at Cedars-Sinai vs. singer/songwriter/actress JoJo, playing for The Hole in the Wall Gang; and former NFL star/Super Bowl champ/actor Vernon Davis, playing for the Vernon Davis Foundation vs. former NFL star/Super Bowl champ Victor Cruz, playing for the Victor Cruz Foundation.

Former "Beverly Hills 90210" sweethearts "Kelly" and "Steve" go note-to-note: Actress Jennie Garth, playing for the Equus Foundation vs. Actor Ian Ziering, playing for The Epidermolysis Bullosa Medical Research Foundation; and Grammy Award-winning artist Shaggy, playing for the Shaggy Make a Difference Foundation vs. Actress/Director Kim Fields ("The Upshaws"), playing for Back On My Feet.

Celebrity contestants Megan Hilty vs. Rumer Willis and Belinda Carlisle vs. Debbie Gibson.

An e-commerce manager and bartender go head-to-head in game one, an operations analyst and a teacher compete in game two.

Lisa Rinna vs Matteo Lane; Stephanie vs Tim

Aisha Tyler vs. Mira Sorvino, Shakayla vs. Desiree

Players race against the clock to test their knowledge of songs performed by the live band.

Sports stars take the stage as it's John Salley vs. Adam Rippon and Rashad Jennings vs. Todd Gurley.

Olympic Medalist Shawn Johnson East vs. Olympic Medalist Gymnast MyKayla Skinner; comedian Loni Love vs. Multi platinum recording artist and global pop act, Ally Brooke.

Former Professional Football Player Colton Underwood vs. Actor/Musician Jesse Metcalfe; Three-Time Olympic Gold Medalist Beach Volleyball Player Misty May-Treanor vs. Star of General Hospital Cameron Mathison.

A dog groomer, a barista, an HR manager and a graduate student compete.

Players race against the clock to test their knowledge of songs performed by the live band; the player with the most money at the end of each game gets to chance to win additional cash and potentially a whole lot of money.

Celebrity contestants Chris Jericho, Adam Rippon, Todrick Hall and Sheryl Swoopes.

Singer/songwriter Cassadee Pope, playing for Creative Waves Foundation vs. singer/actress Jana Kramer, playing for Safe Horizon; and actor/singer Tituss Burgess ("Unbreakable Kimmy Schmidt"), playing for Broadway Dreams vs. Spice Girl and singer/actress Mel B., playing for Women's Aid.

Tyron Woodley vs Tiki Barber and Johnny Weir vs Tara Lapinski.

Tune in to see BFFs battle it out and the show's first ever married couple go head-to-head! Kym Whitley vs. Caroline Rhea; Jamie Chung vs. husband Bryan Greenberg.

Comedian/Actor/Impressionist Jay Pharoah, playing for Pharoah Phamily Phoundation vs. Comedian/Actress Nicole Byer, playing for The Loveland Foundation and Television Personality Teresa Giudice, playing for Autism Science Foundation vs. Singer David Archuleta, playing for The Trevor Project.

A salesman, a hospital manager, an event coordinator and an operations manager compete.