No. 4: Las Vegas, NevadaSin City residents are likely committing skin sins on a daily basis, even if they aren't spending late nights in the clubs and casinos. The stress level and smoking rate are through the roof here, and the year-round sunshine and only 39 percent average humidity doesn't help the good skin cause. If you call Las Vegas home, slather on an antioxidant infused moisturizing lotion and plenty of SPF daily. Estee Lauder DayWear Plus, $38, and Jan Marini Antioxidant Daily Face Protectant, $48, are both top-rated by TotalBeauty.com readers.
SEE NEXT PAGE: No. 3: Pittsburgh, Pennsylvania