Jimmy Fallon  is on a roll! Each night of his inaugural week on The Tonight Show has brought a new, awesome skit — first there was the Evolution of Hip-Hop Dancing , then the ragtime version of "Ignition (Remix),"  and tonight, he revisits the "hashtag" skit with guest Jonah Hill . Like he did with Justin Timberlake , Jimmy and Jonah use the word hashtag for every piece of their conversation and take it to ridiculous new heights, like the Friends theme song and a little Snoop Dogg. Watch the whole thing to get these musical moments — plus a very special cameo from a very important director.
Watch the original skit with Justin Timberlake: