flashed her abs in an unbuttoned shirt as she stepped out in Paris during Fashion Week on Wednesday. <br>The singer, 28, looked effortlessly chic in smart top complete with a pussy bow neckline and puff sleeves. <br>She teamed number with a pair of cropped navy trousers and heeled stilettos with white socks.  <br>Halsey, whose real name is Ashley Nicolette Frangipane, topped her stylish Parisian look off with a black beret. <br>Her long dark hair fell in a straightened style from beneath her hat, wit