This fall, give your backpack a DIY reboot! Create your own fashpack and the raddest bag wins tons of fall swag! You in? HOW TO ENTER 1)      Select a DIY-worthy backpack you want to debut this fall. 2)      DIY it anyway you want – stud it, ombre it, glitter it, shred it, paint it – all of the above! Have fun! 3)      Submit a...