David Letterman

Stephen Colbert has already begun making the final rounds of ‘The Colbert Report’ in preparation for his new CBS ‘Late Show’ hosting gig, but don’t expect David Letterman to vacate the chair just yet. The longest-running late-night host has officially set a departure date for May 2015, bringing an end to ‘The Late Show with David Letterman’ as we know it.

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.

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.

"Summertime! Summertime, people!" Sure, Bruce Willis. We can blame this on it being the summertime. The actor hit 'The Late Show' last night to ... honestly, we don't even know, but eventually it devolved into Willis eating corn on the cob harmonica-style and getting absolutely covered in melted butter. It seems that Willis is a huge fan of corn -- can't get enough of it! -- and he was eager to share some corn-centric life hacks with host David Letterman.

James Franco is, to put it diplomatically, a bit of an odd duck. Sure, he's a very talented guy -- and one who has never balked at using his talents across a wide range of professions -- but he's also kind of a weirdo in plenty of situations, especially as they apply to social media. And David Letterman is not having it.

Yesterday saw 'The Late Late Show' host Craig Ferguson announcing his imminent exit from the 10-year series in December, a move speculated to result from Stephen Colbert taking over David Letterman's 'Late Show,' where it seemed Ferguson had been overlooked. Now, video of Ferguson announcing his exit has arrived, while the 'Late Late Show' host insists his retirement has nothing to do with Letterm

For the first time since he announced his retirement, David Letterman visits with his successor, Stephen Colbert, on the Late Show.

Well, that was fast! Just one week after David Letterman dropped the 'Late Show' bombshell that he would retire in 2015, his replacement has officially been announced. Following early and decisive rumors, Stephen Colbert will officially leave behind Comedy Central's 'Colbert Report' to ascend the late-night throne as the new host of CBS' 'The Late Show.' You're welcome, nation!

Lindsay Lohan hit the 'Late Show With David Letterman' last night, and the pair inevitably prank called Oprah (as one does), a gag that could have gone in a very different reaction if Winfrey wasn't so damn wise. Seriously, don't try to pull the wool over Oprah's eyes. She knows what's up.

Last week saw Dave Letterman shaking up the late-night landscape with the announcement of his imminent retirement, which as since led to all manner of speculation on a replacement, but the impact has already gone further down the pop culture rabbit hole. Watch 'The Simpsons' pay tribute to the retiring 'Late Show' leader with last night's couch gag from "Luca$"!