You Need To Watch Justin Timberlake And Jimmy Fallon Play The BFF Test

    Keepin' your poop in a jar.

    You're probably aware of the beautiful friendship that is Justin Timberlake and Jimmy Fallon. They do everything together. You could say they're just N*SYNC.

    So when Justin appeared on the Tonight Show on Wednesday, Jimmy obviously decided to put their friendship to the test with the Best Friends Challenge.

    The game goes like this: One person reads a question, then both people have to write down how they think that person would answer. This was the first question.

    They both immediately cracked up over what was apparently a private joke, and we all know only BFFs have private jokes.

    The answer was, of course, a tandem bicycle.

    Then there was this question, which seems innocent enough, right? Can't be that funny, right?

    WRONG.

    I DON'T KNOW WHY THIS IS SO FUNNY.

    JT+JF 4evr ❤️.

    Watch the hilarious clip in full here:

    View this video on YouTube

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