"Official Girl" is a song recorded by American singer Cassie. It features vocals by hip-hop rapper Lil Wayne, who wrote his guest verse, while the original composition was written by members of collective The Clutch including Balewa Muhammad, Candice Nelson, Ezekiel Lewis, along with Marcella Araica and Nathaniel "Danja" Hills. Production was also handled by Hills. The song was first released for digital download in the United States on August 5, 2008, through Bad Boy and NextSelection in association with Atlantic Records, who then serviced it to rhythmic contemporary radio stations on September 22, 2008. The single was issued on vinyl as well with a promotional record being released that month.

Casandra Elizabeth Ventura, known mononymously as Cassie, is an American singer, dancer, actress, and model. Born in New London, Connecticut, she began her musical career after meeting record producer Ryan Leslie in late 2004, who signed her to his record label, NextSelection Lifestyle Group. Two years later, Ventura released her debut single "Me & U", which was discovered by rapper Sean "Diddy" Combs; Leslie agreed to partner his NextSelection imprint with Combs' Bad Boy Records for the commercial release of her debut album. The song marked the first of her two entries on the Billboard Hot 100, peaking at number three by July 2006.