Pottery Barn Kids' flamingo costume ($63, originally $79) is accented with satin, feathers, tulle, and sequins, and comes with a dress and a hooded cape. Chasing Fireflies' monarch butterfly ...

Klum's costume not the easiest one to move around in. At the party, she took off her wings after a while. "I just can't see and I can't smell very well," Klum told E! News. So why a butterfly?