"Unity in Diversity" read the passage hovering above Mark Ronson as he hit the stage at Chicago's House of Blues early Friday morning (Aug. 1) to rock the official Lollapalooza kick-off party, presented by Spin, Bud Light, 93XRT, and C3. And there couldn't have been a more accurate description for the soul-funk white boy with a hard-on for trumpets. Hitting the stage after 1 A.M.