Pulling out all the stops! Shaquille O'Neal challenged Jimmy Fallon to a Lip Sync Battle on The Tonight Show on Monday night in Orlando, Florida.
After Fallon rocked out to House of Pain's "Jump Around," Shaq moved the microphone off the stage, declaring, "I'm not gonna need this."
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He then broke into his rendition of Bobby Brown's "My Prerogative." He first brought a female audience member onto the stage, dancing up on her as Fallon laughed in the background.
Shaq was then joined by singer Pitbull and together they swiveled their hips and jammed out to the '80s classic.
"That's not fair!" Fallon shouted. "Pitbull in the house."
To try to salvage his own performance, Fallon did an epic costume change to sing the John Legend and Ariana Grande cover of "Beauty and the Beast."
Watch the clip to see his hilarious outfit choice!
For more Fallon fun, tune into Entertainment Tonight on Tuesday for Jennifer Peros' interview with the Tonight Show host from the opening of the new Universal Orlando Resort attraction "Race Through New York Starring Jimmy Fallon."
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The ride is open to fans on Thursday, April 6.
And for more from Fallon, watch the clip below!