David Letterman

From the Pretty Bad to the Very Bad.

There were no scheduled guests on the final episode of The Late Show With David Letterman (minus The Foo Fighters, who closed out the night with a performance of “Everlong”), but that didn’t mean that a few of Letterman’s old friends didn’t stop by to say goodbye one last time. Some of the funniest people alive all came together to present one final Top Ten list, Things I've Always Wanted to Say To Dave.

You don’t have to wait until later tonight to begin saying goodbye to David Letterman (though if you’re like us, you’ve already started that process) — you can do it right now. The venerable, longtime Late Show host is ending his 33-year run with tonight’s episode, which promises to be a fantastic, hilarious and appropriately heartwarming sendoff. But before we get to that, you can watch Letterman’s final Late Show entrance right now.

Alert, alert: Will Smith still has it. The star of the upcoming con man romantic comedy drama (co-ma rom-com-dram?) Focus hit The Late Show last night to chat it up with host David Letterman and, oh, yeah, to just randomly rap “Gettin Jiggy Wit It” alongside Letterman’s own band. Sure, most late night guests just walk out on stage, give a big hello, and sit down, but not Smith, who seemed determined to remind everyone of his rap roots.

Much as 2014 shook the late night landscape with Jimmy Fallon's ascension to the 'Tonight Show' throne, 2015 will similarly upend the 'Late Show' as 'Colbert Report' host Stephen Colbert takes over for the retiring David Letterman. Colbert himself stopped by Letterman's couch today to talk about the transition, the first footage of which has made its way online!

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!

Paris Hilton was on 'Late Night With David Letterman' on May 2 (promoting herself, as usual) when talk turned to the Lohan clan and Paris' revolving-door love life.

David Letterman pulled zero punches when forced to interview Lindsay Lohan for 'The Late Show' last night (April 9), making the starlet visibly uncomfortable at certain points. Thing is, Letterman's so affable that it was hard for her to stay mad at him.

Back in February, Shia LaBeouf and Alec Baldwin allegedly had “creative differences” over their Broadway play 'Orphans,' which had Shia quitting and then sharing confusing and very personal emails about the entire situation on Twitter. But last night, Apr. 1, LaBeouf went on 'Late Night With David Letterman' and actually tried to make sense of it all. Sort of.

Selena Gomez has been taking passive aggressive digs at Justin Bieber since they first broke up, and she kept the momentum going with her Monday night interview on 'The Late Show With David Letterman,' where she and the adorably gap-toothed host poked fun at her ex's misery. And this time instead of doing a lame dance, Gomez was actually charming and funny.