This year's theme could mean dressing (and partying) like it's 1967, quite literally all-heart print everything, or both at the same time.
If you don't feel like rocking full on fancy dress, check out our pick of the best high street finds get you in the festival spirit.
The best part? They all offer next-day delivery so there's no chance your new wares won't arrive in time. Yaaaaaas!