Sweet Talker (Jessie J album) for anyone who pre-ordered the entire album as a promotional single. "Ain't Been Done" and "Masterpiece" were made available as promotional singles in the same manner on 7 October 2014. On 4 November 2014, Jessie J announced a six-date tour in the UK. An extra London date was added due to popular demand after tickets sold out for the first date. During 2015 Jessie J travelled around the world promoting her album on the Sweet Talker Tour. The album's first single, "Bang Bang" featuring Ariana Grande and Nicki Minaj, was first sent to hot adult contemporary radio on 28 July
Bang Bang (Jessie J, Ariana Grande and Nicki Minaj song) "soulful" song, that features a "clap-heavy" production, built over "big bouncy beats and horn blasts." It's in the key of C Dorian mode, with the vocals making use of the C blues scale. The tempo is 150 BPM (Allegro). The melody of the chorus has been compared to that of "Wake Me Up Before You Go-Go" by Wham!. Rob Sheffield of "Rolling Stone" called the song a "perfect Max Martin throwdown" that "fuses Nelly's 'Country Grammar' with Wham!'s 'Wake Me Up Before You Go-Go,' which is some truly twisted pop archaeology." Carolyn Menyes from "Music Times" called the song "[a]