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Hollywood is having a Heidi moment with stars like Lea Michele, Sarah Gadon, and Alicia Keys opting for braided updos. “This style looks great from every angle, and exudes a fun and youthful vibe,” said hairstylist Marcus Francis, who created Gadon’s halo-plait look for the Cannes Film Festival. To try the look yourself, Francis recommends prepping hair with a volumizer (he loves Phyto Volume Actif, $35; sephora.com) to build up thickness, then adding a spritz of texturizer to keep the braid from slipping. Amp up the style and add lift by loosening the front twist with a tail comb before securing with hair pins. “This creates a slightly more dressy version to the headband braid because of the height,” Francis added. Tell us: Would you try this look? 

Click through to see more celebrity braids!

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Jennifer Aniston, Alicia Keys and Demi Moore stepped out from behind the camera for the premiere of Five at Skylight SoHo in New York City. All three leading ladies directed a short film for the five-part Lifetime movie, which explores the impact of breast cancer on women and the people in their lives. (Watch it Monday, October 10th at 9/8c.) Click through the gallery to see more celebrities at last night’s hottest events!

Summer 2011 has been hot, hot, hot—in the hair department! InStyle.com editors teamed up with Essence.com editors to come up with a list of our favorite black hairstyles this summer, from Beyonce’s blond coils to Alicia Keys’ chunky braid. Click “See the Photos” to see the eleven stars that made our list, then head over to Essence to browse 50 Must-Have Star Hairstyles.

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Don’t be surprised if this Wednesday, your Twitter feed is surprisingly silent. On December 1st, Lady Gaga, Kim Kardashian, Justin Timberlake, Jennifer Hudson and other celebrities have pledged to take a break from social media to draw awareness to World Aids Day, and specifically to Alicia Keys’s Keep a Child Alive campaign. “This is such a direct and instantly emotional way…to get people to pay attention,” the singer told the Associated Press. The stars will sign back on once the charity raises $1 million. To do your part, make a one-time $5 donation to Keep a Child Alive by texting 9099. The charge will appear on your next phone bill.