Don't Breathe A Word by Holly Cupala
I really don't know how this cover hasn't been posted here yet, because I love it. It probably makes my...I don't know...top 100 favorite covers. (That's saying a lot, coming from me.) Seriously, though, I adore this one. It grabs your attention right away with the bright colors and the large, squished text. That font, by the way, is super awesome. It looks like smeared paint, or something. The partially covered face, the little bits of light, it's all so pretty and works together so well for me. Love it.