Lauren Bacall screen test for "To Have and Have Not". Hawks asked his secretary to find out more about her, but the secretary misunderstood and sent Bacall a ticket to come to Hollywood for the audition. After meeting Bacall in Hollywood, Hawks immediately signed her to a seven-year contract, with a weekly salary of $100, and personally began to manage her career. He changed her first name to Lauren, and she chose "Bacall" (a variant of her mother's maiden name) as her screen surname. Slim Hawks also took Bacall under her wing, dressing Bacall stylishly and guiding her in matters of elegance,
What Love Is Made Of extremely positive about "What Love Is Made Of", describing it as "darker than anything" from "On a Mission", while calling it "slinky". The reviewer went on to commend the "irresistibly pouty" chorus. Pitchfork Media's Katherine St. Asaph commented that, in the song, the singer "sound[ed] completely enthralled, by either her lover or the music" and complimented her voice, noting that it seemed "ten times bigger than before". Jordan Sargent of "Spin" magazine called the track "exuberant" and highlighted Katy's vocal performance, which he deemed "typically fantastic", while the team from pop music website Popjustice gave "What Love Is Made Of"