Aubrey Morgan O'Day (born February 11, 1984) is an American singer and reality television personality who has been 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 she reunited with them in 2013 before a second disbandment. She reunited with Danity Kane again in 2018 to 2020, where it became a trio, and has rejoined Danity Kane again in activities since 2025. She also performed in the duo Dumblonde with former Danity Kane bandmate Shannon Bex from 2015 to 2019, and released music with former Danity Kane bandmate Dawn Richards in 2020 as Aubrey x Dawn. 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. Additionally, O'Day has made appearances on reality television shows, including her own show All About Aubrey, the fifth season of The Celebrity Apprentice, Famously Single, Ex on the Beach, the British version of Celebrity Big Brother, The Masked Singer, the fifth season of Baddies, and Dance Moms.