You and a friend could have free reign at Summerfest, the world's largest music festival, by winning two 11-day "Power Passes" plus a pair of tickets to five special concerts courtesy of Summerfest, Diffuser.fm and Ultimate Classic Rock. Summerfest takes place between June 26 and July 7 in Milwaukee, Wis.

Each Power Pass is valid for one (1) general admission each day for all 11 days of Summerfest 2013. In addition, the winner will receive a pair of tickets to five special BMO Harris Pavilion concerts: Billy Idol (performing 6/27), The Zombies (6/29), Alice Cooper (6/30), Styx (7/2), and Foreigner (7/6). (Important note – these tickets do NOT get you into Summerfest alone, you’ll still need the Power Pass to enter the grounds.)

Over 800 acts -- including Rush, the Eagles and many many more -- will perform during the 11 day festival, with nearly a million people expected to attend. You can check out the full lineup here.

For your chance to win, follow the instructions on the widget below. Sharing your entry across the Facebook and Twitter platforms will give you more opportunities to win. Act fast! This contest will expire on June 25, 2013 at 11:59AM EDT. Be sure to read our official contest rules, and good luck!