Beyoncé’s 2008 double album prominently featured the alter ego Sasha Fierce.
The album, titled I Am... Sasha Fierce, was released on November 12, 2008. Its two discs presented contrasting ideas: the “I Am...” disc emphasized more personal material, while the “Sasha Fierce” disc focused on energetic performance songs.
Beyoncé described Sasha Fierce as a stage persona associated with confidence and freedom during performances. The concept helped explain the album’s deliberately divided structure.
The record included “If I Were a Boy,” “Halo,” “Single Ladies (Put a Ring on It),” and “Diva.” “Single Ladies” became especially influential because of its choreography and black-and-white music video.