David Letterman

David Letterman broke the story.

There were all kind of star-studded guests on the last The Late Show With David Letterman, but maybe the most memorable (and definitely the most classy) was not even on that show.

Here are the top 10 reasons you should watch Letterman's final two weeks of shows.

One of the most comforting moments for me in the aftermath of the terrible tragedy in 2001, was when David Letterman returned to CBS' 'The Late Show.'

The late-night landscape will look drastically different by this time next year, now that Jimmy Fallon will take over for Jay Leno as host of 'The Tonight Show' in early 2014, but some things will at least stay the same. Extending his own 2014 contract, David Letterman has re-signed to stick with CBS' 'Late Show with David Letterman' through at least 2015.

Two titans of comedy switched roles and the results were gut-busting.

Republican presidential candidate Gov. Rick Perry caused a stir the other night at a debate when he couldn’t remember the third government department he would close down. You knew talk shows like ‘The Late Show with David Letterman’ were going to say something about it. But it was actually Perry himself who came on to the show last night to give the ‘Top Ten Rick Perry Excuses’ list.

Are you looking to live a long and healthy life? If so, you might want to take some advice from Betty White, who, at age 89, is still going strong. Last night, the Emmy-winning TV legend appeared on 'The Late Show With David Letterman,' during which she revealed her own tips on how to make it to your golden years.

You have 6,000 channels (or about that) but have you seen everything? No worries, we've tracked down the five best clips that will either have you ROFL or wiping away the tears.