So. Cool.<p>1. Playing around in nostalgia territory and am amused by how well pop music re-uses itself over and over.<p>For instance, in May-Oct 1993, #1 spots were dominated mostly by three songs:<p>8 weeks: "That's the Way Love Goes" (Janet Jackson) --> samples "Papa Don't Take No Mess" by James Brown (1974)<p>7 weeks: "(I Can't Help) Falling in Love with You (UB40) --> cover of "We Can't Help Falling in Love" by Elvis (1961)<p>8 weeks: "Dreamlover" (Mariah Carey) --> samples "Blind Alley" by The Emotions (1972)<p>2. Compare that kind of pop-culture inertia to, say, 1974, where the top spot cycled much more frequently, yet those songs have been sampled heavily in the years since.