NO PURCHASE NECESSARY. INTERNET ACCESS & VALID E-MAIL ADDRESS REQUIRED. Void where prohibited. CONTEST (for musicians/bands): Begins: 7/5/2010 & ends 8/15/2010. Musician/Band must include one legal U.S. residents, who are amateur musicians & age of majority. Limit one entry per musician/band. Odds of winning depend on skill exhibited by each musician/band entrant. Finalist musicians/bands chosen by judging panel. ARV of all prizes is approximately $60,000. SWEEPSTAKES (for fans): Begins 7/12/2010 & ends 8/22/2010. Must be a legal U.S. resident. 13 or over, to vote/enter. Limit one entry per person/email per day. Winners selected by random drawing. Odds of winning depend on number of eligible entries received. ARV of all prizes $43,298. Concert date is 9/21. Sponsored by Wm. Wrigley Jr. Company.