1. This Week In Billboard Chart History: Madonna's 'Music' Tops Hot 100

    September 15, 2014 8:05 AM EDT This week in 2000, the Material Girl scored her 12th, and most recent, No. 1. Plus, remembering key chart feats for Adele, Katy Perry and Michael Jackson Your weekly recap celebrating significant milestones from more than seven decades of Billboard chart history Sept. 15, 1990…