Scarlett Johansson is a bit of a chameleon when it comes to red carpet beauty. The actress will happily switch between an updo and retro waves, not to mention several different hair colours in the name of coordinating with her gown. Last week, Scarlett attended the Spike TV Guy's Choice Awards in Los Angeles sporting her blondest shade yet, worn long in a sleek side parting. It worked brilliantly with her sunshine yellow dress. Prior to that she worked a 1960s style half-updo for the Whitehouse Correspondents Dinner in May, which set off her Mad Men style cocktail dress to a tee. In fact, Scarlett's managed to work everything from loose bombshell waves to chignons with great success before. Check out some of her recent red carpet looks below and tell me, which is your favourite?