Jimmy Fallon, Adele & The Roots Sing "Hello" (w/Classroom Instruments)

If Adele's 'Hello' wasn't already stuck in your head then 1. You're a freakish super human with great restraint and resistance and 2. I'M SORRY BECAUSE NOW IT WILL BE! 

Can we all just be best friends with Adele?!... And Jimmy Fallon... And The Roots, too!