John Mayer began his career performing mainly acoustic rock, but gradually began a transition towards the blues genre in 2005 by collaborating with renowned blues artists such as B. B. King, Buddy Guy, and Eric Clapton, and by forming the John Mayer Trio. The blues influence can be heard on his album Continuum, released in September 2006. At the 49th Annual Grammy Awards in 2007 Mayer won Best Pop Vocal Album for Continuum and Best Male Pop Vocal Performance for "Waiting on the World to Change". He released his fourth studio album, Battle Studies, in November 2009.
Keith Lionel Urban (born October 26, 1967) is an Australian country music singer, songwriter and guitarist whose commercial success has been mainly in the United States and Australia. Urban was born in New Zealand and began his career in Brisbane having moved to Caboolture. Several solo albuns since then, and more important, married with Nicole Kidman.
