Ibiza is obviously both a jetset and a hippie island at the same time. If you want to buy some more relaxed clothing you find these little outdoor stores with flowy dresses and flower power prints everywhere (picture from Yamanja right next to Blue Marlin):
My hippie version "light": Crochet shorts, crochet tops, fringes and my favorite hat which I bought in Ibiza four years ago. It's been my partner in crime ever since :)