I think it looks more like a strand of her hair than a nipple. In any case, here's the evidence in every format so that you can decide for yourself.
In GIF form:
Source: slumz.boxden.com / via: crushable.com
In video form:
Via: crushable.com
In screencap form:
Source: slumz.boxden.com / via: crushable.com
What do you think? Nip or not? Tell us what you think, BuzzFeed!