If You Moust You Moust is part of OPI's recent Minnie Mouse Collection. Because of the cool tones in it, it reminds me of Shorts Story - a fave of mine, and also a Jessica polish I have which I don't know the name of (useful Alice, real useful). It's a bright, Barbie-ish, girlie pink without being too in your face.
The formula is amazing - it glides on really well and smoothly, and is completely opaque with two coats. I really love this polish and will add it to my favourite pinks, but perhaps save it for when it's a little warmer, I have suddenly got the urge to have dark dark nails - Lincoln Park After Dark, here I come!