Jimmy Fallon and Will Smith rap 'It Takes Two' and it's outta sight

"Classically trained beat-boxer" Jimmy Fallon reunited with his very first Tonight Show guest Will Smith on Thursday night, and instead of showing off their

, the pair showed off their equally impressive rap skills. With the help of a handy iPad app (there's an app for everything it seems), the two perform It Takes Two. As much as we love the performance (and hey, that app is actually really cool), we're wondering where Smith was when Fallon was recreating the Fresh Prince of Bel-Air opening? It had Carlton and DJ Jazzy Jeff, after all!

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