Romans made blonde wigs from germanic slaves to mock their physical appearance

As these methods failed, Romans of both sexes took to wearing wigs, even though writers, such as Ovid, enjoyed poking fun at those forced to wear them. Blonde wigs were popular, made from the hair of Germans captured in the campaigns along the frontier or trimmed from the golden locks of slave girls. Black hair for wigs was also trimmed from slaves across the provinces, or was sometimes imported from as far away as india.

Encyclopedia of The Roman Empire
Revised Edition
Matthew Bunson
Page 420

http://books.google.com/books?id=T5tic2VunRoC&pg=PA420&dq=romans+mock+blonde+wig&hl=en&sa=X&ei=MelzVOP3L9StyATX94HwBg&ved=0CD4Q6AEwAg#v=onepage&q=romans%20mock%20blonde%20wig&f=false