Gigi - I agree you can't go wrong with denim and white and it doesn't have to be something expensive. You can get white t's just about anywhere really cheap and just get her some cheap jeans or shorts. Try Big W, Best & Less, Cotton on Kids...

Knowing you though babe, I'd say definitely get some shots in her cutest nappy - it doesn't matter that she's nearly two, they'll still be cute and I think you'll kick yourself later if you don't.

Most of all, don't get too caught up in the details, just relax and enjoy it...the photos will be great!