Beyoncé’s singing voice alter ego introduced with I Am... Sasha Fierce was Sasha Fierce.
The name appeared prominently in the title of Beyoncé’s third studio album, I Am... Sasha Fierce, released in 2008. The album was structured as two discs: “I Am...” focused on more personal ballads, while “Sasha Fierce” emphasized more assertive, performance-oriented songs.
Beyoncé described Sasha Fierce as a stage persona associated with confidence, sensuality and high-energy performance. The concept helped frame the contrast between her private self and the larger-than-life character presented during concerts and music videos.
The album produced major singles including “If I Were a Boy,” “Single Ladies (Put a Ring on It)” and “Halo.” “Single Ladies” became especially associated with its choreography and black-and-white video. Later, Beyoncé said she no longer needed to separate herself from the persona in the same way.