Here's my idea - most of my friends have favorite actors/actresses/obsessions and I'm sure many of said objects d'art have worn wigs in at least one of their roles (well, I can't think of any for Peter Davison yet, but I'm working on it - ah! elsaf's just reminded me - Elmer in The Tomorrow People). I've made a McGann as Doc8 icon for judiang and she's promised to post a GIP tonight.
So, get out your favorite photo of your obsession in a wig and make an icon with it and you'll be "Gettin' Wiggy With It!" too!