Wilco's Jeff Tweedy / Photo by Stefanie Michejda

When Jeff Tweedy sang the opening line of "Via Chicago" last night at San Francisco's Outside Lands Festival -- "I dreamt of killing you again last night, and it felt alright to me" -- it seemed vastly appropriate that his band, Wilco, was performing on a stage named "Twin Peaks." But the frontman's demeanor was, for the most part, far sunnier, particularly when faced with a sprawling throng of sunbathed fans in Golden Gate Park's Speedway Meadow. "This is the home of the best music fans in the country," Tweedy said, inciting a swell of clap-alongs.

Click to pages two and three to watch video of Wilco performing "Remember the Mountain Bed" and "Company in My Back."

>> Watch "Remember the Mountain Bed"
>> Watch "Company in My Back."