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Cristina Ehrlich is Hollywood’s go-to expert for putting together solid outfits—she’s behind the some of Hollywood’s most stylish, including Amy Adams, Ashley Greene, Julianna Margulies, Tina Fey, and rising style star Allison Williams—which means she knows exactly how to pick pieces that have longevity. That’s why Coldwater Creek signed her up as their Guest Stylist for the next three months—and we caught up with her in the label’s New York store to get her keen eye on spring trends. Her biggest tip: Don’t be afraid of horizontal stripes. “I really want to help women understand that stripes do work on all body types,” she told InStyle.com. “There’s a sort of myth and fear that horizontal stripes are going to make you look bigger, and it’s really not true.” Instead, a horizontal stripe on top just needs a perfect pairing, she explained. “It’s about understanding how if have print on top that you have solid on bottom, or if you want to wear a printed bottom you wear solid on top.” Words that her clients Williams and Fey clearly live by!

Plus, click through the gallery to see more fashion myths busted.

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Girls loves Girl Rising! Allison Williams (in Dior) stopped by the Paris Theater in New York last night to attend the premiere of the 10×10 movement‘s documentary Girl Rising, which tells the stories of nine girls from different countries who rise above poverty to change their lives through education. The message of the movie supports the mission of the 10×10 movement, which raises awareness about the importance of educating girls worldwide. Click here to see showtimes for this inspiring film near you.

Plus, click through the gallery to see more photos from last night’s biggest parties.

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• Allison Attends the Grammys with Katy Perry 
• Girls Fashion from Costume Designer Jenn Rogien
• The Secret to Allison Williams’ Glowing Skin