You know you have a huge HIT on your hands when Jimmy Fallon has you on his show and sings your song.

If you can't get enough of Meghan Trainor's "All About That Bass"? You're not alone! The singer breakout hit has been blazing up the charts since July. TODAY Show viewers even voted it the top song of the summer.

Now fans of the catchy tune can celebrate, because there's a whole new way to enjoy it. See what happens when Trainor joins Jimmy Fallon with The Roots for a special rendition on "The Tonight Show."

 

 

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