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.

There's nothing better than a game of Flip Cup on "The Tonight Show," and this week was sibling-themed. Yep, Jimmy Fallon and his sister teamed up against Chris and Scott Evans! We won't tell you who won, but please –– this is Captain America we're talking about.

Robert Downey Jr. is a new dad, and get this –– he shared the first public photo of his daughter, Avri, on "Late Night with David Letterman." So. Cute! (All babies should be required to wear yellow bonnets.)

Time for another edition of Lie Witness News! This time, Jimmy Kimmel sent his crew to the streets of L.A. and asked people what they thought of the government's new "Earthquake Schedule." The results? So funny –– bless these poor, confused people's hearts.

Jimmy Kimmel had yet another "Crazy Scandal Dream" last night, and this one was even weirder than usual. Jimmy fantasized that he was a ribbon dancer being judged by Katie Lowes and Joshua Malina –– who also got their ribbon dancing on. Everyone please do yourselves a favor and watch Jimmy in tights.

Kat Dennings is a huge Seinfeld fan (aren't we all?), and totally fan-girled when she appeared on "The Late Late Show" alongside Jason Alexander. Turns out Kat's voicemail is George Costanza singing, so Jason went ahead and recorded her a custom version. This guy!