Jon Stewart is back! The former "Daily Show" host crashed Stephen Colbert's opening monologue, and managed to be both hilarious and poignant due to the fact that he trumped-it-up. Like, he literally wore a Donald Trump wig. You're welcome.
We're sensing a theme, because Justin Bieber crashed James Corden's opening monologue and he made some hilarious jokes. Our favorite? "Yesterday, the CEO of Yahoo gave birth to twins and even they have gmail." Umm...if the whole pop star thing doesn't work out, Bieber has a future in Late Night.
Over on "The Tonight Show," Chris Hemsworth stopped by, donned a Santa hat (we're already thrilled), and had a sleigh scooter race with Jimmy Fallon. Tragically, racing isn't exactly his forte.
Finally, Hillary Clinton showed up on "Late Night" and spoke about Donald Trump. "I no longer think he's funny," she said. "What he's saying now is not only shameful and wrong, it is dangerous." Thoughts?