Her mission to educate extends far beyond her L.A.-area home, though. “People think, ‘Oh, I just need to put sunscreen on when I’m going to be outside at the pool or going to the beach with my family,'” said Mellencamp. But with a huge portion of her melanomas on the right side of her body, where the sun would hit her in the passenger seat, she realized, “You need to be aware when you’re in...