FILE - This May 20, 2011 file photo shows festival goers arrive for the three day Hangout Music Festival in Gulf Shores, Ala. Despite heat, humidity, crowds and costs, music festivals are more popular than ever, attracting millions of fans, with 270 festivals of various types annually in the U.S. and more than 800 in 57 countries. (AP Photo/Mobile Press-Register, Kate Mercer, file)

Associated Press
FILE - This May 20, 2011 file photo shows festival goers arrive for the three day Hangout Music Festival in Gulf Shores, Ala. Despite heat, humidity, crowds and costs, music festivals are more popular than ever, attracting millions of fans, with 270 festivals of various types annually in the U.S. and more than 800 in 57 countries. (AP Photo/Mobile Press-Register, Kate Mercer, file)
FILE - This May 20, 2011 file photo shows festival goers arrive for the three day Hangout Music Festival in Gulf Shores, Ala. Despite heat, humidity, crowds and costs, music festivals are more popular than ever, attracting millions of fans, with 270 festivals of various types annually in the U.S. and more than 800 in 57 countries. (AP Photo/Mobile Press-Register, Kate Mercer, file)
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