Lollapalooza: Summer music festivals

POSTED: 2:23 PM PDT May 10, 2011    UPDATED: 11:00 PM PDT August 1, 2013 
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Lollapalooza starts today in Chicago, Illinois. From the mountains of Colorado to the forests of Milwaukee, this summer will be jam-packed with some of the best music festivals ever. Find out more about these events that spotlight everything from alternative rock to jazz -- and have spawned their own festival cultures.