I don't know whether this was coached or you just got lucky, but she certainly has that "I'm too sexy for my floatie device" look going for her! A bit "snapshot centered" - some open space to the right and less on the left would create a pleasing balance (or so the photo books tell me). I like the lighting but wish there was a tad more on her face, and I like the colors - rich and vibrant. WAY underscored, but I suspect a lot of that was DNMC votes. I really do like her look!
centered composition - blown highlights - obviously a candid (not posed) - shoe-horned into the challenge with a title. I'm guessing this isn't doing well for you.
What would make this better - in my opinion
Frame her left so she's looking across 2/3 of the photo of empty grass
Take a meter reading before you start shooting - realize that your camera meter is shooting the high and set your EV compensation to -0.3 so the highlights stay in control
Look at the light in her face - and the hightlights in her eyes - make her stop - look that direction, and get right into her face so we can see those beautiful eyes and the catch lights in them. (again, framed slightly off center)
These are things that I have found started turning my photos from snapshots into photos that I was really proud of. If this is your daughter I'm sure you're proud anyway - she is beautiful -
Not all precious photos are beautiful photos, not all beautiful photos are precious.