Vince Gill, Sheryl Crow, John Mayer and ZZ Top will be joining Eric Clapton at his third Crossroads Guitar Festival set for June 26 at Toyota Park in Chicago. Others scheduled to perform at the all-day festival include the Allman Brothers Band, Jeff Beck, B.B. King, Sonny Landreth, Buddy Guy, James Burton, Albert Lee, Robert Cray, Robert Randolph, Earl Klugh, Jimmie Vaughan and many others. In related news, Gill has become an official member of the Time Jumpers, a Western swing band that performs each week at Nashville's Station Inn. Most of the band members are local session musicians. Previously, Gill played sporadically with the band but will now be regularly appearing at the Monday night shows as his touring schedule permits.