|1.||Hair did (to get)|
(SL.) When someone gets their hair did, it's slang for having their hair done. No matter which form of the verb, it's hair did.
1. Justin, Alizay, Ray and I are getting our hair did (to get).
2. Several weeks ago,Justin and Lisa had had their hair did.
3. Having had my hair did, I know better than to bleach it.