Sign up to the e-newsletter for all Celebrity Guest updates. Prepare for the ultimate CELEB-BRATION with our amazing Celebrity Guests at FAN EXPO Philadelphia. Among a few other surprises, Susie Wokoma (Chewing Gum) is charmingly chaotic as Elton’s sister Helen, a Doctor Who cosplay makeup YouTuber with agoraphobia. Comics. Cosplay. Gaming. Horror. ”. Comic Creators. Cosplayers. Anyhow, this includes wearing cute dresses and skirts, superman costume accessorized with ribbons or lace.