Did Scarlett Johansson shave part of her head over the weekend? Oh no, that is just a faux undercut with the help of braids (phew!). The actress hit the Hitchcock premiere in a Rodarte minidress and side-swept waves. We've seen similar undercut styles on the runway at Tracy Reese and on the red carpet from Rihanna. But to create the illusion of shaved sides at home, you can take a similar approach by creating two or three diagonal braids from ear to crown. Make sure to cover your hands with hair spray or pomade to get a tight grip. To get that faux undercut look, pin the rest of the hair on the side with bobby pins. Then, wrap your hair around a one-inch barrel iron for voluminous waves. Finish the rock star look off with a vampy lip color like Urban Decay Super-Saturated in Apocalypse ($19).