FUSE TV - Watch Meghan Trainor Perform "All About That Bass" With Jimmy Fallon & The Roots

One of the summer's biggest hits came out of nowhere. "All About That Bass," is the product of Meghan Trainor, a 20-year-old songwriter who, after years behind the scenes, is quickly becoming a prominent pop figure. The best way to solidify fame? Do a viral bit with Jimmy Fallon & the Roots, of course!

The Tonight Show crew and Trainor recorded a stripped down version of her smash song. As per Fallon tradition, only classroom instruments were used. Remember when they did the same bit with Robin Thicke and Carly Rae Jepsen?