News Rihanna's Dream Hair Color, Katy Perry's "Part of Me" Trailer, and More! 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 Published on March 16, 2012 @ 12:25PM Pin Share Tweet Email Photo: Rex USA; Larry Busacca/Getty Images; Eric Vandeville/ABACA Press; Courtesy Photo (3) 1. Rihanna credits Beyoncé's baby girl, Blue Ivy, for making her want navy blue hair. [People StyleWatch] 2. The trailer for Katy Perry's "Part of Me" music video is here! The full feature drops March 21st. [Facebook] 3. The Italian perfumer behind Sarah Jessica Parker's scent created a cologne for the Pope. [The Telegraph] 4. What does it take to make a Chanel tweed jacket? Watch this video and find out! [Fashionologie] 5. If you're a working mom with a penchant for pretty clothes, bookmark Elizabeth Street. [Elizabeth Street] 6. See Johnny Depp as a vampire in the trailer for his new comedy, Dark Shadows. [iTunes]