I think the image is a bit grainy, and not extracted completely cleany, which makes it feel like a collage stuck on top of the glittery 'pink' background (I see you have try to stylized the title to make up for not being able to come up with anything more esoteric ;P).
The bottom right feels empty and I think the composition would feel more balanced with the girls there, or at least on the right. Moving them left, on the other hand, would create a balance of space and weight. Either would be more satisfying I think.
