Hayley Atwell
The Agent Carter star made Lady Gaga's "Bad Romance" look good.
Clark Gregg
The Agents of S.H.I.E.L.D. star recreated Britney Spears' "Toxic" music video.
Hayley Atwell
No one expected the actress to perform THe Offspring's "Pretty Fly (For a White Guy)."
Clark Gregg
Who knew Gregg had heard of Wreck-X-N-Effect's "Rump Shaker"?
Todd Chrisley
The Chrisley Knows Best star embraced his feminine side while covering "Man! I Feel Like a Woman!" by Shania Twain.
NeNe Leakes
The Real Housewives of Atlanta star channeled RuPaul with her cover of "Supermodel (You Better Work)."
Todd Chrisley
The USA reality star thrusted his way through Robin Thicke's "Blurred Lines."
NeNe Leakes
The Fashion Police co-host demanded "Respect" à la Aretha Franklin.
Katharine McPhee
The Smash star showed she knows how to "Shake It Fast," just like Mystikal.
Lauren Cohan
No one does a power ballad like Night Ranger...or Cohan, when she's covering the supergroup's "Sister Christian."
Sonequa Martin-Green
The actress traveled back to the '80s with her rendition of Whitney Houston's "I Wanna Dance with Somebody (Who Loves Me)."
Lauren Cohan
Cohan got into the groove singing "Flashdance... What a Feeling" by Irene Cara.
Sonequa Martin-Green
Just Silentó, the actress made the audience "Watch Me (Whip/Nae Nae)."
Tyler Posey
The Teen Wolf star rocked out to Harvey Danger's "Flagpole Sitta."
Gigi Hadid
You know her name, but that didn't stop Hadid from performing The Ting Tings' "That's Not My Name."
Tyler Posey
The actor took on A-ha's "Take On Me."
Nick Carter, Gigi Hadid & A.J. McLean
The supermodel asked two of the five Backstreet Boys to back her up for "Larger Than Life."
Gabriel Iglesias
Fluffy got the crowd in the mood with Color Me Badd's "I Wanna Sex You Up."
Randy Couture
The MMA fighter got "Physical" in the same manner as Olivia Newton-John does.
Randy Couture
The actor made his intentions known with his cover of Bobby Brown's "My Prerogative."
Gabriel Iglesias
The Magic Mike XXL star dressed in drag to sing Donna Summer's "Hot Stuff."
Eva Longoria
The actress-producer padded her shorts to do Nicki Minaj's "Anaconda."
Hayden Panettiere
The Nashville actress strutted alongside the lady herself—Christina Aguilera—to "Lady Marmalade" from 2001's Moulin Rouge.
Eva Longoria
Wearing Apple Bottom jeans and boots with the fur, the Telenovela star got low to Flo Rida and T-Pain's "Low."