This Is Acting is the seventh studio album by Australian singer and songwriter Sia. It was released on 29 January 2016 by Inertia, Monkey Puzzle and RCA. Mainly an electropop album, it is mostly composed of songs written by Sia for other female pop artists, but were not included on their albums. Sia described songwriting for others as "play-acting," hence the title This Is Acting. "Alive", the album's lead single, was released on 24 September 2015. The second single, "Cheap Thrills", was released on 11 February 2016, becoming a top 5 in a number of markets and marking her first number one on the US Billboard Hot 100.[3] The remix of the track featured guest vocals from Sean Paul. A deluxe edition of This Is Acting was released on 21 October 2016 featuring seven new tracks, including the single remix of "Cheap Thrills" and the solo and Kendrick Lamar-assisted versions of "The Greatest".