Carly Rae Jepsen was featured in the first "Classroom Instruments" segment on June 8, 2012. At the time, the segment was presented as an opportunity for The Roots to showcase their musicianship by playing a stripped-down rendition of the Canadian pop star's hit single "Call Me Maybe."
This is another great take on an instant classic. Maybe it's best that Jimmy never tried to hit Adele's high notes in this one.
The Muppets piled into Jimmy Fallon's green room for the most adorable "Classroom Instruments" yet. Singing the "Sesame Street" theme was one of the segment's most memorable moments.
Metallica are the oldest group of rockers who have ever piled into the show's green room. Keep an eye on The Roots guitarist Captain Kirk Douglas doing overtime as he hammers away chords on his tiny ukulele.
This didn't go as viral as the original version of The Lonely Island's "I'm on a Boat," but this version gets points just for everyone's sailor outfits.
How do you do "All About That Bass" with no actual bass? Somehow Jimmy and Meghan Trainor still made this work.
What made this version of "Bad and Boujee" so different, besides them performing with keyboards, scissors and coffee pots, is that Migos, Fallon and The Roots dressed like characters from "Office Space." That alone makes this worth watching.
Is that Natalie Portman singing along with Jimmy and Sia? You gotta love Sia's monochromatic look that "The Tonight Show" cast went the extra mile to emulate.
For the most recent "Classroom Instruments," Jimmy Fallon performed with the Backstreet Boys for this version of "I Want It That Way."