Fashion Accessories Jewelry Crown Jewels By InStyle Editors InStyle Editors Facebook Instagram Twitter Our editors and writers comprise decades of expertise across the beauty, fashion, lifestyle and wellness spaces in print and digital. We prioritize journalistic integrity, factual accuracy, and also having fun with every story we share. InStyle's editorial guidelines Updated on March 26, 2015 @ 01:29PM Pin Share Tweet Email Trending Videos Photo: Jil Studio/FilmMagic Crown Jewels 01 of 04 Jeff Vespa/WireImage Diamonds are a girl's best friend-and lately in Hollywood, her favorite hair accessory too. 02 of 04 Ron Wolfson/WireImage "Old Hollywood style is coming back," says Sean Flanigan, who created Katherine Heigl's retro thirties style above. "A beautiful hair accessory is part of that look." 03 of 04 Eric Ryan Actress Ziyi Zhang adds sophisticated glamour to her sleek updo with a glittering barrette. 04 of 04 Jil Studio/FilmMagic Don't want to spring for a pricey new bauble? Try recycling one of last year's brooches. "Just sew it securely onto a clear plastic comb," suggests Flanigan.