What is the name of Beyoncé’s alter ego featured on her 2008 double album?

Beyoncé’s alter ego featured on her 2008 double album is Sasha Fierce.

The album I Am... Sasha Fierce was released on November 12, 2008. Its two discs presented contrasting sides of Beyoncé’s artistry: “I Am...” focused on more intimate songs, while “Sasha Fierce” emphasized energetic, performance-oriented material.

Beyoncé described Sasha Fierce as a stage persona rather than a separate person. The character represented the confidence and freedom she felt while performing. This distinction is sometimes blurred because Sasha Fierce was heavily used in the album’s marketing and music videos.

The album produced major singles including “If I Were a Boy,” “Single Ladies (Put a Ring on It),” “Halo,” and “Diva.” It became one of Beyoncé’s most commercially successful releases and earned five Grammy Awards at the 52nd ceremony in 2010.