VIDEO: Dave Matthews, Eddie Vedder Perform on Conan Tour

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.)

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Mix Tape: Garth Brooks Hits Vegas, Def Leppard is Sued

-Apparently retirement didn’t sit with Garth Brooks very well. The country singer began a lengthy stay as the Wynn Hotel’s headliner this weekend.

-Can Jennifer Lopez stay on her feet this time? Find out when the “Louboutins” singer and Mary J. Blige perform on So You Think You Can Dance’s season finale this Wednesday.

-Def Leppard’s former manager, Trudy Green, is suing the band and their accountant for non-payment. Love hurts.

-Billboard recently charted the top One-Hit Wonders of the decade. Somebody out there is having a really “Bad Day.”

-Speaking of the decade, Newsweek chose their Best Albums of the past ten years. Anyone else surprised by the Kelly Clarkson mention?

-Although they already have two children together, Pearl Jam’s Eddie Vedder and his girlfriend, Jill McCormick, are finally getting around to that wedding thing. The longtime couple became engaged a week ago.

Gallery: Mix Tape: Garth Brooks Hits Vegas, Def Leppard is Sued