If you go into the wardrobe, put something new on and then save your avatar, it triggers the achievement. Make sure you go to the needed items checklist on the achievement page after you do that. I just tried it for the Yaherra one and got it. Not sure if it needs to be one of the dolls but that is what I put on...then I took it off.

Unlocked Lifelike Yaherra! Have all of the basic lifelike yaherra dolls in your wardrobe!