Katy Perry Hairstyles modern take on a 1940s classic is actually fairly simple to duplicate.To begin, part hair down the center. Create two vertical sections on either side of the part from the front hairline to behind the ears. Next, take one of the sections and backcomb it thoroughly making sure to smooth the layer closest to the face. Then pull the section straight forward. Katy Perry Hairstyles Roll the hair back with a lot of tension, working from ends to roots, winding tresses around the small, round handle of a hairbrush. When the process is completed, gently slide out the hairbrush and pin the roll in place using bobby pins or u-shaped hair pins and repeat the process on the other side.