The alter ego referenced in Beyoncé’s 2008 double-album title I Am... Sasha Fierce is Sasha Fierce.
The album was released on November 12, 2008, as two discs: I Am..., focused largely on ballads and personal material, and Sasha Fierce, built around more assertive and performance-oriented songs. Beyoncé described Sasha Fierce as a stage persona rather than a separate person.
The project included major hits such as “If I Were a Boy,” “Halo,” “Single Ladies (Put a Ring on It),” and “Diva.” Its split structure illustrated the contrast between Beyoncé’s public performer identity and her more intimate self-presentation.
Sasha Fierce is sometimes mistaken for a character from one of Beyoncé’s films or for a nickname used throughout her entire career. The name specifically belongs to this album-era persona and its title.