David Letterman

Often, particularly colorful characters take to the various late shows to flex the full range of their unique spirit, just for funsies. Joaquin Phoenix looked to be going down that precise path on last night's 'Late Show,' actively imitating himself learning yoga, calling his more personal bits "Julio Igelasias," and just generally having a good time. Host David Letterman looked nervous, but Phoenix looked relaxed, and that might be why Phoenix's good-time appearance took a serious turn when the 'Inherent Vice' star announced his engagement on air.

Things apparently got buckwild on the set of ‘Into the Woods,’ with acting queen of the world (that is her official title, by the way) Meryl Streep very nearly dying (read: probably not dying, but let’s go with it) when she almost fell off a table. It was, however, a witchy table that she happened to be jumping on while playing a witch, complete with witchy robes, which she (witchily?) tripped on. Streep’s fall was broken by one single brave soul: Emily Blunt.

Seth Rogen and James Franco might be good pals and one of Hollywood’s most unlikely--and beloved!--comedy duos, but that doesn’t mean that they can’t step back and see each other for who they really are. For instance, Rogen thinks Franco is “a weird guy,” much like, well, most of America. Weirdly, though, Rogen promises that Franco is perhaps slightly less weird than we all think he is.

Many celebrities would likely balk at turning their late night chat show appearance into a remembrance of a recently passed star -- too emotional, too sad, too something -- but Edward Norton not only took the time during his segment on last night's 'Late Show' to talk about director Mike Nichols with host David Letterman, he did it was style, grace, and some really lovely personal stories.

Here is a brief list of things that happened during Jennifer Lawrence's appearance on 'The Late Show' last night: she sang with host David Letterman, the duo discussed tummy troubles, they chatted about bowling, they both totally biffed introducing a clip, Lawrence begged Letterman to not retire, they walked out during a live taping, and then Lawrence took over the entire show.

Jim Carrey has plenty of trademark characters to trot out -- Ace Ventura, the Cable Guy, Fire Marshall Bill, the Riddler (wait, scratch that one) -- but the funny man seems to be quite recently endeared to a new, highly specific one: fellow actor Matthew McConaughey in his Lincoln commercials. Carrey debuted his take on the admittedly overly dreamy commercials during last week's 'Saturday Night Live,' but he's not done with it just yet.

Beloved NBC sitcom 'Parks and Recreation' is coming to an end after six seasons, and star Amy Poehler isn't taking it so well. Sure, sure, the funny lady is excited about the future for both her and her super-mega-all-star cast, but that doesn't mean she needs to go out on a graceful note. Actually, Poehler is determined to light the place up before she says her final goodbyes.

Although we understand that 'The Late Show' will be getting a bit of a makeover when long-time host David Letterman exits later this year, and while we're extremely excited that Stephen Colbert is taking over the post, we still have a teensy idea: maybe Bill Murray could host it? Or just appear on every single episode? Does Colbert need a sidekick? He has to, right?

When you've been in Hollywood as long as Michael Keaton has, you've probably seen a lot of weird stuff created by fans -- a lot of signs and strange drawings and maybe a wacky letter here and there -- and although that sounds a little off-putting, Keaton is into it. At least, he's into it when your fan art is good, as was the case with a 'Beetlejuice' tattoo he spotted during a late night shoot on his upcoming 'Birdman.'

The rules are simple (in fact, they're pretty much contained within the game's actual name) when it comes to Billy Eichner's 'Celebrity Child or Kentucky Derby Winner?' The 'Billy on the Street' host will name a particular name, and then you need to guess if it belongs to the child of a celebrity or a race-winning pony. Along the way, the loud-mouthed host will use his trademark screaming ability to drive things right along, and if you can get through the tricky trivia and the ear-splitting growl, you can win a dollar for each correct answer.