Alessandra Ambrosio isn?t afraid of taking risks. Just days ago she bared it all in a super sexy photoshoot for Maxim and now she?s changing her signature hairstyle. Her long brunette waves are no more? she has cut her hair into a bob and looks amazing. She teased fans on Instagram with a picture in the salon chair. Ambrosio isn't alone in chopping her long hair. Celebrities like Olivia Culpo, Nicki Minaj, and Audrina Patridge cropping their hair ahead of winter.