Hi, PrettyNylongirl/Anna - the Dare to Bes are like litle informal challenges to achieve a particular look.
Sometimes the inspiration is directly from a particular celebrity (past or present), other times (like now), it's just a concept.
For the Fantastic Plastic Dare to Be, the goal is to make yourself up in such a way that you look like a mannequin - whatever a mannequin looks like to you. There are some inspirational pics at the start of the thread, and people have found more on their own to use as a springboard for their own look. It's really quite fun!
Does that help a little bit? Or were you looking for directions on how to apply mannequin-style makeup?
Welcome!
-b.