(7 of 16) 16 Fall Must-HavesThe seasons are changing, and so are the beauty trends. Here, Glam shows you 8 celebs sporting our top looks for fall and how to get their looks. Simply stock your makeup bag with these 16 must-have products and you’ll be completely covered. Rachel Bilson Rachel Bilson’s naturally full brows bring out her big brown eyes at the Teen Vogue Young Hollywood party on September 21st.