Marc Jacobs can do no wrong. From the moment his diffusion line hit the runway, fashionistas have been lining up around the block to get themselves a piece of the action. The Marc by Marc Jacobs' collection includes many of the designer's coveted details, including vintage lines, girly details like puff sleeves and oversized buttons. With a loyal following that includes the likes of Sofia Coppola and Liv Tyler, the clothing line's modern detailing and sophisticated tailoring is a barometer of cool. A graduate of the Parsons School of Design, Jacobs introduced the diffusion line in 2001. Along with the original ready-to-wear, it now includes shoes and handbags.