Britney sported a sophisticated bob at the X Factor auditions in Greensboro, Nc on July 8 -- Here's how you can get her smooth, straight hair. In order to prepare for her new role as a judge on the hit show, Britney Spears traded her signature wild waves for a more mature manicured bob! The star, 30, is going for a more grownup glam look that's so flattering! To get Britney's sleek hair, use a straightening balm like Straight Sexy Hair Power Straight Straightening Balm. Apply a small amount of the balm to damp hair and distribute from root to tip. Style with a paddle brush as you blow dry your hair, so strands are smooth and touchable. HollywoodLifers, do You love Britney's sleek, polished look? Vote below! -- Jenny Pickard Check Us Out On Pinterest! More Celebrity Beauty: Justin Bieber’s Shocking New Feud With One Direction Revealed Editor’s Picks: The Top Products HollywoodLife.