This is The Tonight Show host, Jimmy Fallon, and "Can't Stop The Feeling!" singer, Justin Timberlake, and their friendship will put yours to shame.
One time, Justin visited Jimmy's show to talk about this crazy coffee mug inception.
During another visit, they played the BFF Test because of course they did.
Justin knew the answer right away and he was adorably excited about it.
So, what was the answer?
But, they don't actually ride around on a tandem bike, right? I mean that'd be too much, too amazing. There's no way tha-
Wait, what's this that Justin posted on his Instagram?