Contestants from Group A perform hits like "SexyBack," "Just Give Me a Reason," "The Door," "La Bamba" and "Mad World."
Group A channels their inner fairytale by performing songs from or inspired by the "Shrek" movie franchise.
Group A swoons, sings and serenades the audience with some of the Rat Pack's most iconic classics.
Five new masks appear as the Voices of Olympus; contestants perform showstopping renditions of "I Believe In a Thing Called Love," "Bad Blood," "Rewrite the Stars," "Espresso" and "Saving All My Love For You."
Group B performs for the judges; special guest Ernie Hudson.
The Group B finalists perform "Save a Horse (Ride a Cowboy), and renditions of "Here You Come Again," "Take Me Home, Country Roads" and "Something in the Water."
The celebrities deliver astounding performances of "Hot to Go," "Jump Around," "Roxanne," "Let's Get Loud" and "Unwell."
Paying tribute to boy bands; contestants perform iconic boy band classics like "Tearin' Up My Heart," "Poison," "Step By Step" and "I Swear."
Each celebrity performs a hit from an iconic era.
The final six celebrities are ready to battle it out to get one step closer to the elusive Golden Mask Trophy; the panelists have an opportunity to ask some rapid-fire questions to each masked contestant.
The final five perform "Sk8er Boi," "Million Reasons," "Golden Hour," "Your Love" and "The Scientist"; one celebrity must reveal themselves while the rest advance to the semifinals.
The four semifinalists battle it out ahead of next week's blockbuster season finale; an unmasking.
Celebrating the 40th anniversary of the iconic film "Footloose."
The three Group A finalists open the special night with a superstar performance of "High Hopes" by Panic! At The Disco, followed by sensational renditions of songs near and dear to the contestants.
Five new contestants make their debut with songs like "Rock Your Body," "Believe" and "We Belong."
The Group B celebrities pay tribute to the 65th anniversary of Mattel's Barbie.
The Group B finalists compete to secure a spot in the quarter-finals; celebrities pay tribute to '60s with songs like "House of the Rising Sun," "Do You Love Me" and "Ain't No Way."
Group C performs "You and I," "Under the Bridge," "Tonight Tonight," "Call Me Maybe" and "Slow Burn."
The celebrities pay homage to some of Miley Cyrus' songs.
Celebrating the beloved Peanuts gang; the celebrities give Thanksgiving-themed clues and perform hits like "I Hope You Dance," "Holiday" and "Ho Hey," culminating in a Battle Royale and Double Elimination.
The group champions are all together to battle it out and share some pivotal clues.
The top three battle it out for the last two spots; the semi-finalists perform "Some Nights."
Nick Lachey performs; the final two compete and the winner is crowned.
The season premiere kicks off with an exciting performance by new panelist Rita Ora; special celebrity performances and a jaw-dropping reveal no one sees coming.
Four new celebrities sing their hearts out and celebrate iconic moments from the legendary "The Wizard of Oz" film; LeAnn Rimes performs.
The celebrity singers belt out classic tunes from the iconic Bill Joel.
Contestants celebrate by performing iconic TV theme songs.
The Season 11 contestants start the night with a showstopping group performance, and then serenade the audience with iconic songs that are best sung at full volume in the shower.
Celebrating the 40th anniversary of Transformers, with special guests Optimus Prime and Bumblebee; each celebrity singer performs a song featured in a "Transformers" movie; two celebrities are unmasked.
Two celebrities break free of their masks and one moves on to the quarter finals.
Panelists open the show with a group performance of the Spice Girls anthem "Wannabe"; Carnie Wilson and Raven Symone return to the stage; the Season 11 contestants perform girl group classics.
Contestants perform songs that hold a special place in their hearts; two celebrities are unmasked.
The final four contestants perform; one celebrity is unmasked, leaving the final three to move on.
Reliving the season's most exciting highlights as well as special performances from the final three; exclusive behind-the-scenes moments from the Season 11 contestants.
The three remaining contestants battle it out for the final two spots.
The Season 10 premiere delivers a special celebrity performance and reveal -- one of the biggest unmaskings in the show's history; alumni Michelle Williams, Rumer Willis, Joey Fatone, Bow Wow, Victor Oladipo and Barry Zito pair up for duets.
Five celebrities perform and one is unmasked.
Five celebrities perform songs from the 2000s and one is unmasked.
Celebrating the music of Elton John.
A special Harry Potter-themed episode; former contestant Adrienne Bailon-Houghton performs.
Four new celebrities sing songs that were once all the rage; an unmasking.
The stars of "Trolls Band Together," Poppy and Branch, take the stage for a special performance.
Celebrating the Disco era, including a special performance by The Trammps; Group A returns for their final competition.
The show celebrates rock 'n' roll as the group B finalists rock out to legendary songs from bands like Kiss, Jon Bon Jovi and Mr. Big; Bret Michaels performs.
Celebrating the holidays with a look back at the best moments from Season 10, featuring all-new jaw-dropping surprise performances from Season 10 contestants.
The group C finalists perform songs representing key moments in their lives.
The final four celebrity contestants perform new songs in the season finale episode before the audience and panel votes; the bottom two singers unmask, then the final two go head-to-head one last time; the winner takes home the Golden Mask trophy.
Three celebrities perform.
Two new characters enter the competition; two are unmasked.
Two new contestants take on the reigning champ from last week and sing a collection of songs synonymous with the history of New York.
Three new singers enter the game and celebrate their favorite iconic DC superheroes in costume; two singers are unmasked.
Two singers are unmasked.
Three celebrities perform their favorite country songs; two are unmasked, but only one singer advances straight to the quarterfinals.
Two singers are unmasked; one advances to the quarterfinals.
Costumed celebrities perform iconic songs from hit Warner Bros. films.
Two singers are unmasked; one goes to the quarterfinals.
A recap of the journeys of the three remaining champions and the three remaining underdogs; a new performance from each of the champions, as well as all-new clues and behind-the-scenes footage.
The three "saved by the bell" singers, Mantis, Gargoyle and Medusa, compete for their spot in the quarterfinals; two are unmasked and only one goes on to be named the group champion; he or she then battles for a spot in the semifinals.
The final four compete for a spot in the coveted semifinals, performing British Invasion-themed songs.
The remaining three celebrity singers perform, but only two move on to compete in the season finale.
Four celebrities perform, with only one contestant moving on to the next week.
Blue Man Group, jugglers and more visit the show to welcome two new celebrity singers for their first performances of the season; two new characters enter the game and two are unmasked.
Two new celebrity singers enter the competition and perform iconic theme songs from TV shows throughout history; two unmaskings.
Two new celebrity singers enter the competition and perform songs from Andrew Lloyd Webber's legendary music catalog; guest panelist Andrew Lloyd Webber.
Miss Piggy serves as a guest panelist, with special appearances and performances by Kermit the Frog, Animal, Fozzie Bear and more Muppet favorites.
Two new characters enter the competition; the studio audience votes for one singer to be unmasked.
Three new characters enter the competition and two are unmasked; guest panelists Leslie Jordan and Joel McHale.
The panelists roast one another as two new characters enter the competition; guest appearances by Drew Carey and Jon Lovitz.
Two new contestants enter the competition, and two are unmasked.
The contestants participate in a three-way battle; one contestant is eliminated and the remaining two advance to the finals.
Fan favorite contestants from Season 8 get into the holiday spirit for a Christmas singalong.
Five celebrities, representing the three categories of good, bad and cuddly, perform.
The remaining four singers from Group A return to the stage for their second performances; one singer will be unmasked.
Group A returns for one final time when the three finalists perform; two singers are unmasked and only one moves on to the finale.
The good, the bad, and the cuddly continue to battle in round two.
The three remaining singers from round two compete for their spot in the finale; guest panelist Leslie Jordan.
A brand-new group of five singers is introduced in the third and final round of the season; guest panelist Leslie Jordan.
The four remaining singers from round three compete; one singer is unmasked and the final three move on to the round three finals.
In the third and final round of the competition, the final three singers perform for the last remaining coveted spot this season; two singers are unmasked and the final singer moves on to the Season 7 finale.
A look back at the best moments and performances from Season 7.
The winner from each of the three final rounds compete head-to-head in the Season 7 finale.