JOHN MAYER Battle Studies (2009 UK 11-track CD album - Incorporating the warmth, melodies and simplicity of 70's and 80's California rock/pop, 'Battle Studies' is a confessional, relaxed and liberated album recorded in a private home in California where Mayer lived and worked over the course of six months before wrapping at the famed Capitol Studios in Los Angeles. Showcasing universal themes on 'Heartbreak Warfare', 'Assassin', 'War of My Life' and a reinterpretation of 'Crossroads','Battle Studies' features a guest appearance by Taylor Swift on 'Half of My Heart', and includes the single 'Who Says', which challenges conventional standards of what one can accomplish or undertake - despite society's constraints)