If you're a fan of a five-minute style, then the knotted hair trend will be your favourite right now. Celebrities have been spotted out and about with quick and carefree top knots that are easy to get at home. Whitney Port kept her half-up hairstyle casual by whipping it up into a precarious knot at the crown. Ashlee Simpson's top knot was constructed by twisting hair around and securing it front and centre, and Julianne Hough opted for a simple yet unexpected knot along her fringe line. Sometimes the best styles are left undone.