You're Such a Budapest from OPI is the most recent addition to my nail polish collection. It's from their Spring 2013 Euro Centrale collection and is the prettiest periwinkle blue shade. I'll definitely be wearing this a lot during the Summer.
When I first saw it I thought of the highly popular Essie Bikini So Teeny from last year which I refrained from buying (for myself at least, I got it for my sister instead). I really love OPI polishes, this is my third full size (I also have a Minnie Mouse collection set of mini polishes) and the formula is very long lasting on my nails. The only downside is that they are hard to find in Ireland, but I order mine from eBay where you can get them a bit less expensive.
You can also buy OPI on Beauty Bay for around €12 with free international delivery.
What are you wearing on your nails at the moment?