It's Anna and Elsa!

 

 These girls were not at all excited to see the Frozen princesses at May's birthday party.

 This is setting the bar for birthday parties really high. I mean, like, really high. There was snow on the ground, they sang Frozen songs, made crowns, painted faces and nails, and...ugh, I can't talk about it anymore. Can't be topped.

I think Elsa has put Mallory and May in some kind of Frozen hypnotic state. Claire just can't stop smiling. I wish I had Frozen powers like that over my kids. I swear I would only use my powers for good :)