Beyoncé devoted half of the tracks on this double-disc set to her feisty alter ego Sasha Fierce (think "Single Ladies"). But, it's the classic, more timeless R&B songs on the "I Am" portion of the album that seem like a much-welcomed stretch for the singer. Lead single "If I Were a Boy" is the first taste of Beyoncé's newfound love for powerful ballads, as she croons about reversing gender roles. On "Halo" she sings in a lower register than usual over big drums and an epic piano pattern and belts emotively ("I don't want a broken heart/And I don't want to play the broken-hearted girl") on the Babyface-penned "Broken-Hearted Girl." Songs like "Video Phone," with its repetitive, vibrating beat, and the thumping "Diva," a collaboration with Sean Garrett, don't break new ground but more than provide the radio-ready dance tracks for which Beyoncé, er, Sasha Fierce, is beloved. —Mariel Concepcion