Meghan Trainor stopped by The Tonight Show to perform her song 'All About That Bass' with Jimmy Fallon and The Roots... using classroom instruments!

We've seen a few jam sessions with Jimmy Fallon and The Roots before, with Robin Thicke, Idina Menzel, Carly Rae Jepson, and a few others. I don't think we've been disappointed yet!

If you haven't heard 'All About That Bass' before, you should be tuning in to Mix! We've had it on for the past few days. It's a pretty catchy tune that is starting to climb that charts quick. Seems like this "classroom" version is pretty good too.

My favorite song like this so far would probably be 'Let It Go' with Idina Menzel. Who would you like to see perform with Jimmy and The Roots?

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