Getting the frosty finish is easy, Kohlhagen said. You can either opt for an opal lipstick that you can apply straight from the tube (she likes the NYX Professional Makeup Glitter Goals Liquid Lipstick ($9)), or, if you want to add more oomph (and it's Summer, so why wouldn't you?), "try lightly brushing a frosted eye shadow over the centre of the lips" to add extra shine, Kohlhagen said.