Celebrity Halle and Katie's Hollywood Art Party and More! By Bronwyn Barnes Bronwyn Barnes Instagram Twitter Bronwyn is the VP of Commerce for Health and Beauty at Dotdash Meredith and joined the team in 2021. She is a professional storyteller and digital pioneer with 20 years of experience in print, digital and social media. Before joining Dotdash Meredith, Bronwyn was co-founder and Chief Creative Officer of a boutique content agency, combining editorial style and brand marketing principles to create custom digital and social media content for brands like Hilton Hotels, Waldorf Astoria, and Bulgari. She was the founding social media editor of InStyle's Facebook, Twitter, and Instagram accounts and architect of early social media brand partnerships with brands like Target, Lionsgate Films, and Essie. Bronwyn has also worked as an editor and writer, at InStyle, Entertainment Weekly, People, Travel + Leisure, and more. Bronwyn earned a B.A. in literature and sociology from Queen's University at Kingston. InStyle's editorial guidelines Published on May 20, 2011 @ 02:36PM Pin Share Tweet Email Photo: Chris Weeks/WireImage The leading ladies of movies, music and television gave us a supersized dose of style last night! In Los Angeles, Halle Berry (in vintage Roberto Cavalli) and Katie Holmes (in a Madewell dress and Lanvin blazer) joined gallery-goers for the opening of Beauty Culture at the Annenberg Space for Photography, while Kristen Bell walked the red carpet at the premiere of The Hangover Part II in a light-as-air silk chiffon dress by J. Mendel. In New York City, Rachel Bilson debuted not one, but two gorgeous ensembles from Chanel as she made the rounds to promote her new television series, Hart of Dixie. And in Cannes, Gwen Stefani got heads turning (and jaws dropping!) in her flawless custom L.A.M.B. gown at the 2011 amfAR Cinema Against AIDS gala. Click here to see the hottest star looks at last night's parties!