/cgl/ - Cosplay & EGL

To the cosplayers out there, how do you create a makeup look for a character?
For example, I'm doing princess tutu for an upcoming convention. She has this single long lash in addition to her normal lashes, but I'm choosing to interpret that as a long wing liner because it'd look odd in real life otherwise. I'm making up the difference using a slanted lash strip. As for eye shadow though, I'm not sure what to do. She doesn't cannonically have eye shadow on so should I leave my lids blank? Should I do a natural "barely there" look? Or a pink shadow? I've heard that it's better to put on a little bit of makeup rather than nothing, even for barefaced characters.
So what do you think? How do you approach cosplay makeup looks?