© Licensed to London News Pictures. 09/06/2014. London, UK.   John Mayer performing live at The O2 Arena to promote his sixth album 'Paradise Valley'.  John Mayer is an American recording artist and producer.  In 2003 he won a Grammy Award for Best Male Pop Vocal Performance for 'Your Body is a Wonderland', in 2007 he won a Grammy Award for Best Male Pop Vocal Performance for 'Waiting on the World to Change'.   Photo credit : Richard Isaac/LNP