Jimmy Fallon’s “Classroom Instruments” musical segment on The Tonight Show is always a show-stopper, and when Adele stops by, you know it’s going to be next-level great.

The 27-year-old singer paid a visit to the late-night show on Monday and played a hilarious game of Box of Lies with Fallon, but the best was yet to come, as the host waited until Tuesday night to debut the songstress’ new take on her hit single, “Hello.”

WATCH: Adele Stuns With 'Hello' and New Single During 'SNL'

Accompanied by Tonight Show house band The Roots and a bunch of elementary-level instruments, Adele unsurprisingly nailed the cover, crooning her ballad into a green toy flip phone.

On Tuesday, powered by the success of “Hello” and Adele’s whirlwind media tour, the singer’s third studio album, 25, officially broke *NSYNC's massive single-week U.S. album sales record in just four days with more than 2,433,000 albums sold, according to Nielsen Music via Billboard. The boy band set the bar more than a decade ago, selling 2,416,000 copies of No Strings Attached in the week ending March 26, 2000.

"In all honesty, Adele is the truth -- kinda excited a rare talent like hers is in the same breath as our group. I'm a huge fan," former *NSYNC member Joey Fatone told Billboard on Tuesday. "I even bought the damn album."

WATCH: Jennifer Lawrence Adds Adele and Emma Stone to Her Famous Squad

“Hello” has been seemingly everywhere in the month since it’s release, even working it’s way into a hilarious SNL sketch on Saturday, but this version might be our favorite yet!

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