Which Beyoncé album introduced the alter ego Sasha Fierce?

I Am... Sasha Fierce introduced Beyoncé’s alter ego Sasha Fierce.

Beyoncé released I Am... Sasha Fierce in November 2008. It was designed as a double album: the I Am... disc emphasized ballads and personal material, while the Sasha Fierce disc presented more assertive, dance-oriented songs.

Beyoncé described Sasha Fierce as a performance persona rather than a separate person. She used the concept to distinguish her offstage identity from the confident character she inhabited during concerts and high-energy recordings. The album included “If I Were a Boy,” “Halo,” “Single Ladies (Put a Ring on It),” and “Diva.”

The album’s title is sometimes shortened in casual discussion, but the canonical title includes the ellipsis and the name Sasha Fierce. Beyoncé later said she had retired the alter ego, explaining that she no longer needed a separate persona to access confidence onstage.