In We’re No. 1, The A.V. Club examines a song that went to No. 1 on the Billboard charts to get to the heart of what it means to be popular in pop music, and how that has changed over the years. In this installment, we cover The Rolling Stones’ “Brown Sugar,” which spent two weeks at No. 1 on the Billboard Hot 100 Airplay chart starting on May 29, 1971.