1. Weekly Chart Notes: Madonna, Justin Bieber, Silversun Pickups

    April 06, 2012 5:35 PM EDT As Madonna and Richie claim the Billboard 200's top two spots, consumers are partying like it's 1986. WE LOVE THE '80s: "What's going on family? Can you believe we are sitting on the top of the charts together again?," Lionel Richie Tweeted to Madonna Wednesday …