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

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.

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

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

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

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

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

Fallon and Hill did a sequel to "Hashtag," the skit Justin Timberlake originated last year.

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

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

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

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