A Celebroid was a type of android on Olleril. They could be imprinted with the memories of living people.
Crispin used Celebroids to replace famous people to increase his control of Olleril. He had a Celebroid copy of the Seventh Doctor made so he could obtain the TARDIS. When the Jeff Shrubb Celebroid realised its true nature, it decided to lead the other Celebroids to take over Olleril and then the universe. Crispin deactivated it before it could achieve any of its goals. (PROSE: Tragedy Day)