"Only Girl (In the World)" is a song by Barbadian singer Rihanna from her fifth studio album, Loud (2010). It was released as the album's lead single on September 10, 2010, by Def Jam Recordings. Crystal Johnson wrote the song in collaboration with its producers Stargate (Mikkel S. Eriksen and Tor Erik Hermansen) and Sandy Vee. Rihanna contacted Stargate before Loud's production and asked the duo to create lively, upbeat music. "Only Girl (In the World)" was the first song composed for the album and Rihanna decided to include it on the track list before she recorded her vocals. Backed by a strong bassline and synthesizers, the song is a dance-pop, Eurodance and "rave" R&B track that has an electronic composition. Its lyrics describe the singer demanding attention from her lover.