Hmmm... Maybe you could export it uncompressed from FCP and then put it into iMovie? I think
this guide might help you out a bit during the last part in making full quality videos? Although I'm not the one to ask, because it's been years since I used a Mac.
But for viewing purposes, I can accept this.
:16-:18 moves really slowly. Is this a slow down effect? If so, maybe speed it up just a bit to make it look a tad more natural?
:50-1:00 - I feel like this could be improved with a few additional scenes of her with her friends.
1:30-1:37 : Again, I feel like you might be able to find a more impactful scene here. It looks fine at first, but I feel like it could have an additional dramatic scene that's more impactful and transitions easier to the next scene.
Other than that? Adorable track.

Loved every second of it.