Jimmy Fallon's First Week at The Tonight Show Has Been Pure Gold

The Tonight Show Starring Jimmy Fallon is off to a funny, fantastic, and star-filled start! The new host has carried his usual hijinks over from his last gig, and we're not complaining. This week has been like a tour of his greatest hits, from a sequel to "Hashtag" to a new edition of "Ew!" Everything has been bigger and better, and Will Smith even went full-on Fresh Prince of Bel-Air for "The Evolution of Hip-Hop Dancing." In case you've been falling asleep early this week, take a look at the videos everyone is talking about. Source: NBC

click to play video

Jimmy's $100 Bet With Every Celebrity Ever

For his first order of business, Fallon lightened the mood by bringing a parade of his celebrity friends on the stage to pay up for not believing he would make it to The Tonight Show.

click to play video

The Evolution of Hip-Hop Dancing With Will Smith

Then, he welcomed Will Smith for a lesson in the history of hip-hop dancing. Yes, they do The Carlton.

click to play video

The Ragtime Gals Perform "Ignition (Remix)"

The infamous Ragtime Gals made an appearance, singing R. Kelly's classic hit.

click to play video

Kristen Wiig Dresses Up as Harry Styles

Then Kristen Wiig turned up as Harry Styles — because why not?

click to play video

Charades: Part 1

Emma Thompson swung by for a quick game of celebrity charades.

click to play video

Charades: Part 2

At which point, we all learned that Bradley Cooper is terrible at charades.

click to play video

Brian Williams Raps "Rapper's Delight"

Because no week is complete without a rap supercut, Brian Williams performed "Rapper's Delight" — sort of.

click to play video

"Ew!" With First Lady Michelle Obama and Will Ferrell

The new show is so popular, even Michelle Obama appeared on "Ew!" with Fallon and Will Ferrell.

click to play video

Will Ferrell Shows Off His Downton Abbey Skating Routine

Ferrell is no second-string guest, though. He performed a skating routine to the theme of Downton Abbey.

click to play video

The History of Rap 5 With Justin Timberlake

Is there any other way to close out the week than with The History of Rap 5?