This is a really nifty artwork! I really like what you've done with the colors you chose. There's a very nice, almost watercolor-y thing going on with those blues and purples, which looks very gorgeous. I like the white outlines, too!
Haha, I had to open it up to check (and keep in mind that I would delete/merge some layers as they weren't needed) but the current count is about 16, for the text, the lines, shadows, colours, overlays and a couple filters. I like working on more layers because then I can reverse certain things.