Rema is a singer-songwriter from Nigeria who calls his music "Afrorave," a type of Afrobeats sprinkled with Arabian and Indian sounds. In 2019, Rema signed a record deal with Jonzing World, a subsidiary of Mavin Records owned by record producer Don Jazzy. He released his self-titled debut EP Rema in 2019, and the following year MTV Europe nominated him for an award for Best African Act. This song is the second single from Rema's debut album, Rave & Roses.
Rema sings the song in a mixture of English and Pidgin English. He recounts a true love story of his, which started with him meeting a girl at a party. Rema was immediately attracted to her and they chatted and danced, but she felt insecure and preferred to stick with her friends. The singer told her to "calm down," but her trust issues killed the vibe. However, they stayed in touch and later hit it off.
The song originated when Rema was vibing and chilling with some folks from his Mavin label. They went into a studio where they hooked up with Andre Vibez, one of the in-house music producers signed under Don Jazzy's label imprint. "Vibez saw that our energy was up, and we just wanted to freestyle on beats," Rema recalled. "The next day, I recorded and brought up my experience where I met a girl at a party."
Rema released "Calm Down" on February 11, 2022. It charted throughout Europe, reaching #1 in Belgium, The Netherlands and Switzerland.
Selena Gomez hooked up with Rema for the song's remix, which the Nigerian released on August 26, 2022. Gomez sings from the perspective of Rema's love interest.