I've been peeling these girls' hair because of a project I'm planning for them. The later releases' glue is super secure and really hurt my hand (-﹏-) It's very fun to see them in different hair style! But it does remove their keychain feature since that goes with the hair. Currently the models shown are Sour Sweeties Nina Heartpop and Sweethearts Collection Ruby Hearts on various hair pieces.

For anyone interested in doing it themselves, dunk your doll heads in just-boiled water for half a minute and start peeling them by their weak points!

Britney Boba and Astrid Stars were really difficult. The first series dolls were by far the easiest. You can remove the excess glue with 90% isopropyl alcohol (for tough ones you can use acetone), but use a cotton swap, and be careful not to get the solvents on areas with paint! They will remove paint.