We check this website, now moonprincess.tumblr.com is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is moonprincess Down Right Now? - NO! moonprincess is up!
If you have problem with access to site moonprincess, and domain moonprincess.tumblr.com is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).