Posted by Jenny SmithEyebrows are a key element to celebrity looks, with the A-listers adapting them to suit their style, according to an expert.Celebrity make-up artist Damone Roberts, an eyebrow guru to the stars, told USA Today that eyebrows can dramatically affect a person's appearance, potentially adding or taking years off them."Eyebrows are the most important, underestimated feature on the face," he explained."They can make your eyes look bigger, your nose look smaller, your face look leaner."Mr Roberts counts actors Robert Downey Jr and Gwyneth Paltrow, tennis star Serena Williams and singers Alicia Keys and Madonna among his famous clients.He said that Serena Williams had her brows shaped prior to playing Wimbledon so that even without make-up on, she still looked stylish.Madonna reinvents her eyebrows in the same way that she updates her style, Mr Roberts revealed.The New York Times recently reported that Blake Lively's hair style is fast becoming the must have look for women.(c) 2008 Adfero Ltd.