Footage of Duff McKagan's Loaded performing a cover of Nirvana's classic song "Lithium" has been posted on the Web and can be viewed below.  The performance was caught at a tribute event held at the Sky Church in Seattle's Experience Music Project on September 20th to honor the 20th anniversary of the release of "Nevermind."  The album was played in its entirety at the event, with each song pwerformed by a different Seattle-based band.  Besides Loaded, Nirvana bassist Krist Vovoselic, members of the Fastbacks, Campfire O.K., and Presidents of the U.S.A. also performed.