Harry Styles is the hearthrob of teenage girls the world over - and there's only one reason that could be. His hair! But prepare to be shocked, the One Direction star actually uses surf spray to bring that crazy curl and wave to his naturally straight hair. Harry is living proof that girls do prefer curls! If you're a naturally curly guy (lucky you), then you should use a hairdryer with a diffuser to get Harry's swept-over style. Remember that the foundation of this style is a great cut to achieve the balance between messy and stylish.