"Single Ladies (Put a Ring on It)" is a dance-pop and R&B song from American singer Beyoncé's third studio album, I Am... Sasha Fierce (2008). Columbia Records released "Single Ladies" as a single on October 13, 2008 alongside "If I Were a Boy", showcasing the contrast between Beyoncé and her aggressive onstage alter ego Sasha Fierce. It explores men's unwillingness to propose or commit. In the song, the female protagonist is in a club to celebrate her single status.