What is the name of Beyoncé’s onstage alter ego introduced in the 2000s?

Beyoncé’s onstage alter ego introduced in the 2000s was Sasha Fierce. She described Sasha as a more confident and uninhibited performance persona associated with her stage presence.

The name became especially prominent with the 2008 double album I Am... Sasha Fierce. The project separated songs reflecting Beyoncé’s personal side from songs designed around the bolder Sasha Fierce character.

The album included “If I Were a Boy,” “Single Ladies (Put a Ring on It),” and “Halo.” These songs represented different moods, so the album’s two-disc structure became part of its central concept.

Beyoncé later said that she had retired Sasha Fierce because she no longer needed to separate her private self from her performance identity. “Sasha Fierce” therefore refers to a named persona, not a separate performer or legal identity.