Joe Walsh, Heart's Ann and Nancy Wilson and The Pretenders' Chrissie Hynde make guest appearances on the new album from Microsoft co-founder Paul Allen.

Allen -- who started the Experience Music Project in Seattle -- and his band The Underthinkers are also joined by The Allman Brothers Band's Derek Trucks and Los Lobos' David Hidalgo on Everywhere at Once, which is due out on August 6th. All proceeds from the album will go to fund educational programs through the EMP.