Another classic from The Tonight Show Starring Jimmy Fallon! This time, Jimmy Fallon, Meghan Trainor and The Roots break out the classroom instruments, and play and sing the 2014 hit song "All About the Bass"!

I love what Jimmy Fallon has done to The Tonight Show. He's updated it, and in my opinion really made it must see tv, the way it used to be. Thankfully they also realize this is 2014 and load many of the highlights onto You Tube, because I normally can't stay up that late :)