Neil Young not only played with Dave Matthews at the “Hope For Haiti Now” telethon earlier tonight, but he also performed a touching rendition of Stills-Young Band classic “Long May You Run” for Conan O’Brien’s final episode as the host of the Tonight Show on NBC. Those weren’t the only epic musical moments of the evening, however, as we had previously believed…

Conan himself jammed with Will Ferrell, Beck, Ben Harper, and ZZ Top’s Billy Gibbons for a version of “Free Bird.” Seriously! Lynyrd Skynyrd’s epic classic rock jam “Free Bird” (complete with cowbell). Videos of both performances are embedded below.

Between this and O’Brien’s classy farewell speech, Coco’s final week has definitely made a few contributions to the canon of legendary TV moments at this point, I say.

Watch Will Ferrell, Beck, Ben Harper, Billy Gibbons, and Conan play “Free Bird” below:

Jimmy Fallon can do all the (brilliant) Neil Young impressions he wants, but his predecessor has the real thing coming up for his farewell episode of the Tonight Show on Friday night. The Wrap reports that NBC and Conan O’Brien finally reached an agreement this morning that officially makes this week O’Brien’s last as the host of the famous late-night talk show.

Don’t worry, though, Team CoCo. The Cone Bone will get $45 million from the network for his trouble, the possibility of returning to television in 8 months, and living legend Neil Young as his final musical guest.

Sure, some of us were originally hoping for the White Stripes to sing Conan off into the sunset (as they did for his final Late Night episode), but it’s pretty hard to beat Neil Young when it comes to making the night special. Not to mention, Will Ferrell and Tom Hanks are also among scheduled guests for Friday’s farewell, so it should be a fun, albeit bittersweet, goodbye.

All signs are sadly pointing to this week being Conan O’Brien’s last as the host of the Tonight Show, but the Cone Bone is going out with a bang, at least, plotting farewell appearances by Barry Manilow, Tom Hanks, Will Ferrell, and a previously scheduled performance by Austin’s own Spoon on tonight’s episode.

It’s all uphill from Ke$ha, I suppose, but damn if Britt Daniel and company didn’t rock the f$ck out of Transference single “Written In Reverse” on CoCo’s Craigslisted Tonight Show set. (Plus, how ‘bout Max Weinberg’s Led Zeppelin cover licensing money grab FTW?! Better than stealing an unopened box of ballpoint Bics, I say.)

Watch Spoon on Conan here or below:

Pearl Jam bassist Jeff Ament must have recovered well from last month’s violent mugging in Atlanta because the band is set to perform on the first episode of The Tonight Show with Conan O’Brien on June 1. EW reports that Will Ferrell will also be a guest for Conan’s highly anticipated premiere.

It will be interesting to see if Pearl Jam performs new material on the show, as they have been recording a new album (at the Atlanta studio where the mugging occurred) with their other favorite O’Brien, producer Brendan O’Brien.

Jay Leno’s final bow on The Tonight Show is on May 29th with successor Conan O’Brien as his guest and a performance by Prince.