The 5SOS boys hit the stage to perform their breakthrough single 'She Looks So Perfect'. This image appears in the gallery:Billboard Music Awards 2014: The 25 Pictures You NEED To See 6. The 5SOS boys hit the stage to perform their breakthrough single 'She Looks So Perfect'. Picture: PA 25 images See the full gallery: Billboard Music Awards 2014: The 25 Pictures You NEED To See