What alter ego gave Beyoncé’s 2008 album its subtitle?

The alter ego that gave Beyoncé’s 2008 album its subtitle was Sasha Fierce.

I Am... Sasha Fierce was released on November 12, 2008. The double album separated Beyoncé’s music into two contrasting discs: I Am... emphasized ballads and personal material, while Sasha Fierce presented more assertive, dance-oriented songs. Beyoncé described Sasha Fierce as a performance persona that helped her become more uninhibited onstage.

The album included “If I Were a Boy,” “Single Ladies (Put a Ring on It),” “Halo,” and “Diva.” The songs were marketed across the two-disc concept, although the album was sold as one release. Beyoncé later said that she had retired the Sasha Fierce alter ego by the time she was working on later projects.

The title is often shortened to Sasha Fierce, but that phrase alone is the alter ego rather than the full album title. I Am... Sasha Fierce earned Beyoncé multiple Grammy nominations and contributed to her six wins at the 2010 ceremony.