What alter ego did Beyoncé use for her 2008 double album I Am... Sasha Fierce?

Beyoncé used the alter ego Sasha Fierce for the second disc of her 2008 double album I Am... Sasha Fierce. She described Sasha as a more theatrical, confident stage persona distinct from her private self.

The album was divided into I Am..., which emphasized ballads and personal songs, and Sasha Fierce, which focused more heavily on energetic pop and R&B performances. Its major singles included “If I Were a Boy,” “Single Ladies (Put a Ring on It),” and “Halo.”

Sasha Fierce was not a separate performer or another recording artist. Beyoncé later said she had retired the persona, making the name especially associated with the album era and its visual performances.