You don't just need to wear sunscreen when it's sunny out—you need it all day, every day! Just ask Rancho Mirage dermatologist, Wendy Roberts "Wearing sunblock all day long is the best skin protection," says Roberts. "Put it on first thing in the morning and if you're outside, in peak UV hours, reapply every two to three hours." Don't forget it! Click through our gallery for more answers to your summer beauty questions.