We’re pretty sure that the greatest moments in the history of the Late Night with Conan O’Brien show all involve Triumph The Insult Comic Dog, but when it comes to the greatest moments in the show’s history featuring guests, this video clip compilation is tough to beat. It features classic moments from the show featuring about 20 different guests, ranging from Jim Carrey to Halle Berry to Martha Stewart.

We’ve always believed that Tracy Morgan is the greatest TV talk show guest of all time (even when he’s not threatening to get somebody pregnant) and his latest appearance on Late Night With Conan O’Brien further confirms our belief. In this appearance, Tracy rants and rambles about all sorts of nonsense including everything from how he hangs out with Oprah Winfrey and Sade to his stretch marks, and his alter ego, Chico Divine. None of it makes sense, but all of it is hilarious.

Triumph The Insult Comic Dog from Late Night with Conan O’Brien has made videos with more than his share of losers over the years - from Star Wars nerds, to comic book geeks, to Bon Jovi fans, to Republicans - but his latest funny video revolves around the most magical loser around, David Blaine. Triumph recently caught up with David Blaine at his horrendous Dive of Death stunt (which wasn’t nearly as impressive as one of these stunts would have been) and chatted with Blaine and his fans as the Dive of Death was taking place.

There wasn’t a whole lot to get excited about at the Republican National Convention, but luckily Triumph The Insult Comic Dog showed up to give us something to cheer about. In this clip from Late Night with Conan O’Brien, Triumph chats up the Republican delegates about Sarah Palin, Fred Thompson, and John McCain.

Talk about a match made in doggie heaven - Late Night with Conan O’Brien’s favorite insult comic dog Triumph recently paid a visit to Comic-Con, the world’s largest nerd gathering, and found plenty of people worthy of his insults.

We’re not sure how, but somehow last week we missed Triumph the Insult Dog’s visit to the Belmont Stakes where he delivered yet another hilarious report, this time ripping on a mix of horse racing fans, owners, jockeys, and Long Islanders.