Beyoncé introduced the stage persona Sasha Fierce with her 2008 album I Am... Sasha Fierce.
The album presents two contrasting sides of performance: the more personal “I Am...” disc and the energetic “Sasha Fierce” disc. Beyoncé described Sasha Fierce as a performance alter ego associated with confidence, glamour, and her onstage presence. The idea helped explain the difference between her private personality and her highly theatrical concert persona.
I Am... Sasha Fierce was released on November 12, 2008. It includes the singles “If I Were a Boy,” “Single Ladies (Put a Ring on It),” “Halo,” and “Ego.” “Single Ladies” became especially famous for its black-and-white video and distinctive choreography.
The name is often mixed up with “Yoncé,” a nickname Beyoncé has used in lyrics and performances. Sasha Fierce was the specific alter ego connected to the 2008 album and its accompanying era. Beyoncé later said she had retired the persona, explaining that Sasha Fierce had served its purpose during an earlier stage of her career.