Katy Perry looks young and sweet with her blonde bob. The touch of pink is a great way to add personality to an otherwise simple haircut. The great thing about blonde hair is that you can add anything too it-permanent colors, temporary colors, bright colors, even pastel colors show up. If you don’t want to commit to permanent color, then you can always try a hair chalk. It washes out in the shower and gives you a ton of color options to try!