What name did Beyoncé use for her performance persona in the late 2000s?

Beyoncé called her late-2000s performance persona Sasha Fierce.

The name became especially prominent with her 2008 third studio album, I Am... Sasha Fierce. The album was structured around two contrasting discs: “I Am...” emphasized more personal ballads, while “Sasha Fierce” represented a bolder, more confident stage identity.

Beyoncé explained that Sasha Fierce was an alter ego she associated with performing, especially the confidence and intensity required onstage. The concept helped frame the album’s contrast between private vulnerability and public spectacle.

The name should not be confused with “Queen Bey,” a nickname used by fans and media, or “Yoncé,” a shortened form of Beyoncé used in lyrics and branding. Sasha Fierce specifically refers to the performance persona connected to the 2008 album.