Everywhere at Once features some stellar guests. Joe Walsh, Derek Trucks, Heart's Ann and Nancy Wilson, Chrissie Hynde, Doyle Bramhall II, Los Lobos' David Hidalgo and Ivan Neville all feature on the album. Allen himself co-wrote all of the songs.

Seattle-native Allen saw Jimi Hendrix perform when he was 16 and was key in founding the EMP Museum in Seattle. Allen paid a reported $2m at auction to buy the guitar Hendrix played in '69 at Woodstock.

"I've rarely gone a week without picking up a guitar," he wrote in his memoir. "It's more than a hobby; it gives me balance and keeps me in the moment, which can be a challenge with all the projects I'm pursuing at any one time� I take music with me wherever I go."