Meghan Trainor's "All About That Bass" has become an anthem of sorts for women everywhere. It's a none-to-subtle middle finger to the folks who perpetuate the idea that women aren't attractive unless they're stick thin. The song's popularity has made Trainor an instant star.

This week, she went on "The Tonight Show Starring Jimmy Fallon" to perform, but before that, she got together with Jimmy and the Roots to perform "All About That Bass" and play it on classroom instruments. I think this is my favorite one of these videos yet. 

There's just something about seeing all of those guys playing tiny instruments (what's with the apple and the banana in the bottom right corner, by the way?) and singing along with this girl-power anthem that just makes me smile.