Watch Jimmy Fallon And Justin Timberlake Put Their Epic Friendship To The Test

The "Best Friends Challenge" was made for them.

Tonight Show host Jimmy Fallon has taken the "Best Friends Challenge" with a few different celebrities, but let's be honest — we were all waiting for him to do it with Justin Timberlake. The two have been a dynamic duo for years now, bringing us endless laughs on Saturday Night Live and in fun segments on both of Jimmy's talk shows.

If there was any question in your mind that they're real best friends, just watch them answer questions about each other. Laughter and inside jokes abound, and they end the game with an impromptu duet of Toto's "Africa."

In 2011, the pair spoke to GQ about their shared excitement for performing. "There's something so fun about taking that risk and doing live stuff. I think we both have that in our DNA," Jimmy said. Justin added, "For me, being earnest and genuine is way easier than acting like you just don't care, like you don't want to be here, like this is a drag."

We're so glad they both feel that way, because it means we get to continue watching them have a good time together.

See Jimmy and Justin put their friendship to the test below:

Then watch them do one of their favorite things — perform in a silly sketch together: