Variety's Abe Burns reports from the front lines at this weekend's Lollapalooza festival in downtown Chicago.

Robert Smith said it best: Hot Hot Hot!!! Chicago in August -- the sun is intense, the air is humid and water costs 3 bux. Now picture you're a band, so you've got to be at the top of your game -- or 75 thousand people are going to hate you and tell their friends they hate you and so on...

Holy Fuck kicked off the festival. The chaotic Canadian foursome, lead by noisemaking duo Graham Walsh and Brian Borcherdt, presented a true sonic lo-fi overhaul early in the afternoon. Falling somewhere between Sonic Youth, My Bloody Valentine and Kraftwerk, they offer a true representation of Lolla's eclectic musical palette. Supporting their latest LP, the aptly titled LP, the band's pounding soundscapes are stunning, almost mirage-like -- just don't pass out.

Next up were California mid-tempo indie-rockers Rogue Wave. The band, who recently left Sub Pop for Jack Johnson's Brushfire Records, has seen much success from a hard-to-miss (think Sara Bareilles/Rhapsody) ZUNE promo campaign using the anthemic "Lake Michigan," which they of course included in their set.

Brooklyn's own Yeasayer (above) provided a spaced-out and rhythmically mesmerizing respite before Welsh songstress Duffy (below) took the stage, armed with her '60s-tinged pop hit "Mercy" which pays homage to Dusty Springfield and Stax/Motown favorites of the same era. On stage, she may lack the personality of Amy Winehouse and the charm/sheen of Adele, but songs like "Rockferry" and "Stepping Stone" prove she at least has the material to put up the fight.

• Day Two Photos - Lollapalooza
• Day One Photos - Lollapalooza