Cats and Christmas trees

My kitten just recently started to jump into my Christmas tree. She just sits in it! We have a fake tree and I'm not really sure what is so tempting about it to her. We have had it up for two weeks now and this is the first day that she has done it but she won't stop. I keep telling her no, and take her out of the tree but she still doesn't get it! Anyone else have cats or kittens that won't leave your tree alone and what do you do about it?