What are you missing if you don’t have a ticket to Conan O’Brien’s road tour? Well, in addition to appearances from Andy Richter, Triumph the Insult Comic Dog and Coco himself, possibly some great musical numbers.

On Sunday (Conan O’Brien’s birthday), surprise guest Dave Matthews - with help from some audience members in Seattle - sang “Happy Birthday” to the late-night host before leading into a performance of “Bartender.”

The next day, Eddie Vedder and Mike McCready from Pearl Jam both visited the show and rocked the house with a cover of The Who’s “Baba O’Riley.” (You can see that performance after the jump.)