Rock City, also known as R. City and Planet VI, is an American musical duo formed in 2003, from Saint Thomas, U.S. Virgin Islands. The duo, composed of brothers Theron and Timothy Thomas, who use the stage names, A.I. and Uptown AP respectively. The Thomas brothers also write and produce for other artists, including Sean Kingston, Miley Cyrus, Nicki Minaj and Rihanna. The duo has also contributed to numerous Grammy-nominated albums including Rihanna’s Unapologetic, Jennifer Hudson’s self-titled album, and Ariana Grande’s My Everything. Rock City also releases original music, having released several mixtapes since 2008. The group had previously been signed to Geffen Records and KonLive, where they released a series of mixtapes with the primary title, PTFAO – a reference to the fact that their debut album Wake the Neighbors, had not been given a release date. In 2011, the duo was released from their contract with KonLive, and founded Rebelution Records, on which they intended to release their debut album. A new album, What Dreams Are Made Of, is due to be released in 2015, after being signed to Kemosabe Records and RCA Records by Dr. Luke.