Aubrey Morgan O'Day (born February 11, 1984) is an American singer-songwriter, member of the duo Dumblonde, reality television personality, and a member of the girl group Danity Kane. Following discord among Danity Kane and with her mentor at the time, P. Diddy, O'Day was fired from the group in 2008, but reunited with them in 2013 before a second disbandment. Danity Kane reunited in 2018 as a trio.
O'Day has modeled for magazines such as Blender and Playboy, and performed on Broadway in Hairspray. In 2011, she signed a solo record deal with SRC/Universal Motown Records, and released her debut EP Between Two Evils in 2013. In 2015, O'Day formed the electropop duo Dumblonde with her fellow Danity Kane groupmate Shannon Bex.
Additionally, O'Day has made appearances on reality television shows, including the fifth season of Donald Trump's Celebrity Apprentice, Famously Single on the E! Network, and, most recently, she placed fifth on Celebrity Big Brother 18.