Hasbro sculptor Dave Vennemeyer will be live sculpting on the Hasbro Booth at Celebration at the con.
Head over to the Hasbro booth 721 during the show to see him working. Theres a big TV screen behind him so you can see the intricate detail of his sculpts. Hopefully he may also have a display of previous heads.
Heres an archive interview from Celebration 5 by friend of Jedi News Dan Curto.