OP: My DD3 was the same way... she just didn't care. They always say girls are easier, but not for us. DS5 was 100% potty trained in less than a day!
We tried the same approach with DD3, but didn't have any luck, but maybe you will. We told him for about 3 days prior that "Saturday" was the big day. That morning, we stripped him of his bottoms and put the potty in the living room. We asked him every 30 minutes or so if he had to go and/or about 5-10 minutes after drinking/eating. He had one accident. But I'm thinking now that because he didn't like to be wet/dirty, and he grasped onto how to work things easily, that it made it easier for us.
For DD3, we went the pullup route. I hated it b/c I was so anti-pullup. But like Cathy stated, once you switch to underwear/panties, do not go back. Also try one thing at a time. With DD3 we worked on being at home/school with no pullup, then we worked on going places with no pullup, then night time training.
But with both kids, reminding them several days before that there was going to be a special day helped a bunch.
Oh, and when DD3 tells us she can't because she's too little or just a baby (when it's an obvious thing that she can do like walking - yes she will tell us she can't walk), we "cry" that we miss our big girl. Gets her every time. Mean, I know, but it also lets her know that while we loved it when she was a baby, we also really love the age she is now and all the things she can do.
good luck!
