Musicians John Mayer, left, and Buddy Guy play onstage during the Crossroads Guitar Festival 2007 held at Toyota Park on July 28, 2007, in Bridgeview, Ill. They were among almost two dozen famous guitarists who took the stage to benefit Eric Clapton's favorite charity in what turned out to be an 11-hour performance.
Musician Eric Clapton waves to the audience at the end of the Crossroads Guitar Festival 2007 held at Toyota Park on July 28, 2007, in Bridgeview, Ill. This is the second such festival Clapton has run to raise funds for the Crossroads Centre, a substance-abuse treatment center he founded in Antigua in the 1990s.
Musician Sheryl Crow performs during the Crossroads Guitar Festival 2007 held at Toyota Park on July 28, 2007, in Bridgeview, Ill. This was the second such festival Clapton has organized. The first ran over several days in Texas in 2004.
Blues musician B.B. King, right, hugs musician Robert Cray following his performance at the Crossroads Guitar Festival 2007 held at Toyota Park on July 28, 2007, in Bridgeview, Ill. The 81-year-old King, who joined Cray's band for three numbers, also saluted Clapton as one of the most gracious men he's ever me.
A general view of the atmosphere at the Crossroads Guitar Festival 2007 held at Toyota Park on July 28, 2007, in Bridgeview, Ill. Some 29,000 fans paid $90 each for the 11-hour marathon of music.
A view of some of the 29,000 fans who gathered at Toyota Park in Bridgeview, Ill,, on July 28, 2007, for Eric Clapton's second Crossroads Guitar Festival to benefit the rehab center the guitarist founded in Antigua.
Illinois-born comedian and actor Bill Murray served as host of the 11-hour Crossroads Guitar Festival 2007 held at Toyota Park on July 28, 2007, in Bridgeview, Ill.
Host Bill Murray speaks during the Crossroads Guitar Festival 2007 held at Toyota Park on July 28, 2007, in Bridgeview, Ill. Murray turned up on stage in a variety of costumes, including this redneck outfit he wore while calling for "a NASCAR moment."
Wearing a white suit, comedian Bill Murray performs during the Crossroads Guitar Festival 2007 held at Toyota Park on July 28, 2007, in Bridgeview, Ill. The festival emcee, Murray acted as a different character each time he came on stage.
Comedian Bill Murray is dressed as a 1970s musician as he appears on stage as emcee of Crossroads Guitar Festival 2007 held at Toyota Park on July 28, 2007, in Bridgeview, Ill.
Musician John Mayer performs during the Crossroads Guitar Festival 2007 held at Toyota Park on July 28, 2007, in Bridgeview, Ill. Mayer performed solo and also joined Buddy Guy Hubert Sumlin, Johnny Winter, Robert Cray and Jimmie Vaughan on the closing two numbers.
Musician Alison Krauss performs during the Crossroads Guitar Festival 2007 held at Toyota Park on July 28, 2007, in Bridgeview, Ill.
Country musician Vince Gill performs during the Crossroads Guitar Festival 2007 held at Toyota Park on July 28, 2007, in Bridgeview, Ill. Gill came on stage after emcee Bill Murray, doing a redneck impersonation, called for a NASCAR moment.
Musician Jeff Beck performs during the Crossroads Guitar Festival 2007 held at Toyota Park on July 28, 2007 in Bridgeview, Ill. Beck took the stage for nearly an hour.
Country star Willie Nelson performs during the Crossroads Guitar Festival 2007 held at Toyota Park on July 28, 2007, in Bridgeview, Ill.
Guitarist Derek Trucks, left, and drummer Yonrico Scott from the Derek Trucks band perform during the Crossroads Guitar Festival 2007 held at Toyota Park on July 28, 2007 in Bridgeview, Ill. Trucks has toured with festival organizer Eric Clapton in recent years.
Musician John McLaughlin performs during the Crossroads Guitar Festival 2007 held at Toyota Park on July 28, 2007, in Bridgeview, Ill.