"Full Moon" is a song by American recording artist Brandy Norwood, from her same-titled third studio album (2002). A breakaway from Rodney "Darkchild" Jerkins' dominating influence on the album, it was written and produced by Mike City, one of the few producers Norwood worked with on Full Moon apart from Jerkins and his production and songwriting crew. The song initially impacted on US radios on April 1, 2002 as the album's second single. Described by Norwood as "ghetto", the track is a R&B and pop song that makes use of pop and hip-hop influences and a simple, piano–led production. Lyrically, the song follows Norwood as she experiences a love at first sight in a nightclub, whose circumstances she attributes to a full moon night.

The song was well received by music critics, with many complimenting Norwood's voice as well as the bass–heavy production, calling it a standout track from the album. As a single, it performed moderately well across global formats. It charted within the top 20 of the Billboard Hot 100 and the Hot R&B/Hip-Hop Singles & Tracks chart stateside, number 15 on the UK Singles Chart and made it to the top 30 in France and Italy, where it enjoyed equal commercial success as previous single "What About Us?".

The song's music video, directed by Chris Robinson, features Norwood telescoping at night. As the video progresses, she attends a house party where she meets a man with whom she is eventually riding off through Los Angeles, watching the rising full moon. Norwood was nearly six months pregnant at the time of the shot. "Full Moon" was included on the set-lists of the Human World Tour (2009), the Slayana World Tour (2016) and performed live by Norwood during several televised events, including Dick Clark's American Bandstand 50th Anniversary Celebration and BET's Just Human special (2008).

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