A hand-picked collection of 2015 lookbooks and style guides:
http://www.harpersbazaar.com/summer-fashion/
http://www.style.com/trends/fashion/2015/spring-trends-shopping-guide
http://www.vogue.com/fashion/trends/
http://www.rebeccachriqui.com/ALDO-SS15-Style-Guide
http://www.elle.com/summer-fashion/