To call yourself a superfan, do you buy all the albums, attend all the concerts and own at least three T-shirts?
Yes, yes and yes.
But some fans take things a little further. Like this one.
Trawling through the photo archives for this weekend's Glastonbury festival, we found a David Bowie fan so obsessed with the musical master she carried around a giant paper mache effigy of the man on her shoulders.