Freestylin' with The Roots, a Tonight Show segment which sees The Roots improvising songs about audience members based on a few simple questions, is already wholesomely entertaining enough.
But when you add in a surprise guess appearance from a semi-disguised Drew Barrymore, the whole thing goes up a notch.
Come for the music, stay for how genuinely excited Fallon is to have Barrymore on the show.
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