Dream Factory by Brad Barkley and Heather Hepler
I much prefer Brad and Heather to Rachel and David. I know Nick and Norah was the big hot read last year, but for my money, this team are much better writers, and it seemed to me that Hepler's writing has improved a lot in this second teaming.
Luke and Ella are working as characters at Disney World for the summer because the regular employees are on strike. It's typical teen novel fare: they both like each other, but let themselves get drawn in by other people, then it looks like they'll actually get together, then it flops, then it's happily ever after... but this duo really have a beautiful writing style that sets them apart. A YAY for me.