I Am... Sasha Fierce is Beyoncé's third studio album, released on November 14, 2008. It is a double album that explores the duality of her personality: the more intimate and vulnerable side (I Am...) and the confident stage alter ego (Sasha Fierce). Recording sessions spanned over a year.
The album debuted at number one on the Billboard 200, selling 482,000 copies in its first week. It includes the hit singles 'If I Were a Boy', 'Single Ladies (Put a Ring on It)', 'Halo', and 'Sweet Dreams'. 'Single Ladies' became a cultural phenomenon, winning the Grammy for Song of the Year.
I Am... Sasha Fierce received positive reviews and was a massive commercial success, selling over 8 million copies worldwide. It won six Grammy Awards, including Best Contemporary R&B Album. The album cemented Beyoncé as one of the most influential artists of her generation.