If you follow Mandy Moore on Instagram — as I do, and I’m glad I do, because she’s charming and fun and also shows us a lot of interesting bits and pieces of her life without getting too personal, which has to be a very tough line to walk as a celeb — you’ve already seen this dress, and in fact it might look even cuter on her Insta than it did in other photos. BEHOLD:

This thing can MOVE. No wonder she couldn’t resist it.

[Photos:  REX/Shutterstock]