What alter ego gave Beyoncé’s 2008 album its second-half title?

Sasha Fierce was the alter ego behind the second-half title of Beyoncé’s 2008 album I Am... Sasha Fierce.

The double album was released on November 12, 2008. Its two discs were designed around contrasting ideas: “I Am...” presented more personal and vulnerable material, while “Sasha Fierce” represented a confident, performance-focused persona.

Beyoncé later explained that she regarded Sasha Fierce as a stage persona that emerged when she performed. The concept helped frame the album’s contrast between intimate ballads and energetic pop and R&B songs.

The album produced major singles including “If I Were a Boy,” “Single Ladies (Put a Ring on It),” “Halo,” and “Ego.” Beyoncé later said she had retired the Sasha Fierce persona after feeling that she no longer needed to separate her stage confidence from her personal identity.