"I Am... Sasha Fierce" is the third studio album by American singer Beyoncé, released on November 18, 2008. The album features a dual concept, showcasing two sides of Beyoncé: her personal self and her alter ego, Sasha Fierce. It includes a mix of genres, such as R&B, pop, and soul, and highlights themes of love, empowerment, and self-expression. The album received critical acclaim and commercial success, debuting at number one on the Billboard 200 chart. It produced several hit singles, including "If I Were a Boy," "Single Ladies (Put a Ring on It)," and "Halo," solidifying Beyoncé's status as a leading figure in the music industry.