If you're like us and value your sleep, you probably nodded off into your Ambien dreamland before the party started on post-prime time TV. Don't worry; we've got you covered. Here's the best of what happened last night on late night.

The moment you've been waiting for is here: Jimmy Fallon performed an epic mashup of The History of Rap –– including a rendition of R.Kelly's "Ignition Remix." Watch it once. Then watch it again.

But wait. It gets better. Because Ellen DeGeneres swung by for a casual lip sync battle. And yes, she sung "Bitch Better Have My Money."

In other news, Seth Meyers.

And over on Stephen Colbert's "The Late Show," the man himself sat down (er, lay down) with Scarlett Johansson to discuss some of life's deepest questions. Like "is there a differences between living and being alive," and "would you rather have feet for hands or hands for feet."

Finally (and most amazingly), The Late Late Show." Spoiler alert: he was 16 and she was $45 an hour.