Sir John, Beyoncé's makeup artist since 2010, unpacks her makeup looks in some of her most iconic music videos, including "Partition," "Pretty Hurts," "Haunted," "Blow," "Formation," "Sorry," "6 Inch," and "Daddy Lessons." Don’t miss Sir John on the season finale of “American Beauty Star” airing Thursday at 10:30 pm ET/PT on Lifetime (or @lifetimetv).