Nice exposure and color. Model's posed looks unnatural and uncomfortable. Mouth position is kind-of off too. I like the purple beads in her hand, and the white grate / pattern for the background.
For me, I'm first drawn to the woman's open mouth - perhaps a closed smile would have been less distracting. Secondly, I'm drawn to the good vivid colors of the balloons. I like the lighting and the left hand side of your image best.