NO PURCHASE NECESSARY to enter the sweepstakes. A purchase does not increase your chances of winning. Open only to legal residents of the 50 U.S. & DC, who, as of the last day of the month prior to the date of entry, are 18 years of age or older. Void where prohibited. The Clairol Natural Instincts Healthy Hot Challenge starts 9/2/13 & ends 5:00 pm ET 9/29/13. Sponsored by The Procter & Gamble Distributing LLC. For Official Rules, click here.