: Introduced the "alter ego"—the high-octane, aggressive, and ultra-confident performer. This disc housed "Single Ladies (Put a Ring on It)" and "Diva," tracks that defined the "Sasha Fierce" persona as a shield for her natural shyness. Legacy of the "Download" Culture
– This side highlights the woman behind the superstar. It’s filled with introspective, acoustic-leaning ballads like the multi-platinum hit "Halo" and "If I Were a Boy". : Introduced the "alter ego"—the high-octane