Ah, Marc Jacobs, the trends you kick off. I can picture you, up in the echelons of some high-rise building, giggling with glee (Mr Burns style), in the knowledge that all you need do is throw some crafty jewels onto headbands on the catwalk, and bam! They're appearing on the high street! The latest online store to stock up on this catwalk-inspired trend is Shop Intuition, with these gaudy (but tackfabulous) wide silk ...