Single Ladies (Put a Ring on It)

"Single Ladies (Put a Ring on It)" is a song by American singer Beyoncé from her third studio album, I Am... Sasha Fierce (2008). Columbia Records released "Single Ladies" as a single on October 8, 2008, as a double A-side 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.

"Single Ladies" won three Grammy Awards in 2009, including Song of the Year, among other accolades. Several news media sources named it as one of the best songs of 2008, while some considered it one of the best songs of the decade. Rolling Stone ranked it at number 228 on their list of the 500 greatest songs of all time in 2021. It topped the US Billboard Hot 100 chart for four non-consecutive weeks and received a 11× platinum certification by the Recording Industry Association of America (RIAA). The song charted among the top ten within the singles category in several other countries. Globally, it was 2009's seventh best-selling digital single with 6.1 million copies sold.

A black-and-white music video accompanied the single's release. It won several awards, including three at the 2009 MTV Video Music Awards winning the top prize Video of the Year. Beyoncé has performed "Single Ladies" on television and during her concert tours. The song and particularly its music video have been widely parodied and imitated. Several notable artists have performed cover versions. Media usage has included placement in popular television shows.