The Deep Blue is the second studio album by English musician Charlotte Hatherley, released on 5 March 2007 under Hatherley's own label Little Sister Records. She left Ash in January 2006; she visited Australia, where she stayed for two months, and wrote 17 new songs. After contacting Eric Drew Feldman, recording sessions were held at The Red House Studio in Senigallia, Italy, and Miloco Studios in London, with Feldman, Rob Ellis and Hatherley acting as producers. Described as a post-punk and power pop album, The Deep Blue saw Hatherley's guitarwork being sidestepped, allowing more of an emphasis on other instruments, such as bass, strings, and piano.