Who sing a song single ladies?

The song "Single Ladies (Put a Ring on It)" is sung by Beyoncé Knowles. It was released on October 8, 2008, as the lead single from her third studio album, "I Am...Sasha Fierce" (2008). The song became a critical and commercial success, topping the charts in various countries and winning many awards, including Grammy Awards for Song of the Year and Best Female Pop Vocal Performance.