We reached out to two noted experts -- master esthetician and creator of Ling New York, Ling Chan (who works with clients including Adriana Lima, Madonna, Alexander Wang, and Behati Prinsloo) and dermatologist and founder of Derma di Colore, Carlos A. Charles, MD. These experts talk about some of the most searched skin-care problems -- and the common missteps you can avoid when it comes to taking care of your skin.