Get ready to want be best friends with Olivia O’Brien. Cosmo goes under the covers with the ‘hate u love u’ singer! She gets real about her acne, spills the secrets to having *healthy* dyed hair and sings us a lullaby version of ‘Love Myself.’ Olivia fesses up to eating a box of Girl Scout cookies a day (same) and agrees that peel off masks are SO SATISFYING.