Ready for the fastest feet you've seen today?
For the latest instalment of his wildly popular "Lip Sync Battle" segment, Fallon invited Saturday Night Live favourite Tiffany Haddish into the arena.
Both kicked off with some solid '90s nostalgia. Fallon shimmied through Deee-Lite's 1990 banger "Groove Is in the Heart," but Haddish absolutely nailed the Lady of Rage's 1994 track "Afro Puffs."
The late show host picked Post Malone's "Psycho," which seemed to slow the pace, but Fallon picked it up with a few of the rapper's signature face tattoos. But Haddish went old school for James Brown's "Get Up (I Feel Like Being a) Sex Machine" with some highly fancy footwork.
