According to AllMusic, it was Galt McDermott, who wrote the music for "Hair" and another musical "Who the Murderer Was", who employed the four members of Curved Air as a house band, who suggested when the stage show closed that they add Kristina to the line-up. Another version has it that manager Mark Hanau had the idea Kristina's alto vocals could become a vital ingredient in a new band. On 1 January 1970, the singer received an official invitation to become a member of Curved Air. She remembered sitting backstage on the theatre stairs listening to a cassette of the band's music Hanau had given her, and being much impressed. Described by Sting as a "real beauty, otherworldly and unattainable", Kristina played a full creative role bringing with it a powerful female sexuality. Her experiences working as a croupier in the London Playboy Club during the early 1970s, reflected itself in the stage persona she later developed.