Singleton was born and raised in Los Angeles.[1] She began writing stories, raps, and poems during childhood.[2] She received a degree in public relations and later worked as a production assistant. She worked full time as a publicist before shifting to focus on screenwriting.[2] She met Issa Rae at a workshop for content creators and Rae agreed to co-produce Singleton's first comedy screenplay.[2] Singleton later collaborated with Rae on Insecure; she began as Prentice Penny's assistant on the first season, before transitioning to staff writer.[3] In 2019, a re-imagining of Set It Off to be produced by Rae and co-written with Nina Gloster was announced.[4] In 2021, she signed a one-year overall deal with HBO and Max.[5]
Next, Issa Rae asked Singleton to serve as showrunner for Rae's second scripted series, Rap Sh!t, which ran for two seasons.[6][7] Singleton was also a writer for Black Monday and Central Park.[3]
Her debut feature film screenplay, One of Them Days, premiered in January 2025.[8] The comedy, starring, Keke Palmer and SZA, received positive critical reception.[9]