Ke$ha comes back to the Social 50 chart for the first time since dropping from the list in March 2012. The return at No. 48 comes as she drums up online activity (16% rise in Facebook reaction) to generate buzz around her upcoming album, "Warrior" (due Dec. 4). Elsewhere, the Rolling Stones re-enters the chart following the release of a greatest hits album and 50th anniversary concerts. And Nicki Minaj re-enters the top 10 at No. 9 (20-9) after releasing the music video for "Freedom."
