Fashion is certainly a vicious cycle. Take the above photo from H&M's "Wake Up Spring" collection for example. To me, the skirt screams Prada spring 2011. While the H&M skirt may not be identical to any particular Prada look, it's all relative, and I'm confident the H&M team drew inspiration from the Italian label. It's essentially the same concept, only at a lower price point and relateable to the H&M consumer.
images via: Fashion Gone Rogue, Vogue.com