Summerfest offers a free general admission opening day ticket to Summerfest 2012. That's the best offer we've seen for this event since 2010. Summerfest is an 11-day music festival that runs from June 27 to July 8 in Milwaukee, WI. Among the artists scheduled to appear are Neil Diamond, Zac Brown Band, and Lady Antebellum. This offer is valid for 45,000 redemptions or 45 hours, whichever comes first.

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