NBCUniversal Upfront 2016: Best Moments

Jimmy Fallon's Hamilton-inspired entrance was, well, inspired! (That said, we would've appreciated if part of his proclamation included, "This is going to be two hours long.")

But there's no question, Fallon's best line was: "10 new shows premiere this fall, the word Chicago appears in them all!"

"I'm a big fan of Mr. Robot — love you, Rami," swooned Amazon Echo's "Alexa" from her prime seat at Radio City. (Do we have a 'ship name for those two yet? #Ralexa? #Alami?)

And here's The Royals' Elizabeth Hurley with... worms?

"They're all a little drunk," The Voice's Miley Cyrus said of the advertising elite in the audience, adding, "But that's OK. So are we."

Never one to be out-diva'd, here's how Mariah Carey appeared on stage to promote her new reality series, Mariah's World.

Here's another shot of Carey in her "going to the grocery store" outfit. (Side note: Was it awkward when Andy Cohen asked her to show off her engagement ring? Nick Cannon does still work for NBC, doesn't he?)

Saturday Night Live's Kate McKinnon filled in for a "busy" Ellen DeGeneres, explaining, "There's an Ellen in every major city. It's like Chick fil A, but more gay-friendly."

And what would an appearance from "Ellen" be without a group selfie, including the likes of Sophia Bush, Andy Cohen, Maya Rudolph, Martin Short, Kyle Richards, Matt Lanter and Jennifer Lopez?