When I was younger I read a book about a teen girl who was an orphan who started to attend an academy that only a few people were allowed to attend because when the students turned a certain age they would wake up with a tattoo that would give you powers. I remember the girl had two love interests and one was depicted as bad and another had a girlfriend at the time. But turns out that the bad guy was actually good in the end and one had the ability to shape shift. When she got her tattoo it was bigger than anyone else's and it was sparkly. Her power was the ability to copy other people's power. And during the book there was a costume party and she dressed up as Tinker Bell.
This was a long book so I thought a was a standalone not part of a series. At one point in the book she finds out that one of her parents had a fire ability and their house got burned or something like that and that's how they died and her father was really powerful. And she met her brother or step brother who had a similar ability which was to steal people's abilities or something like that. It turns out he's a bad guy and they fight and he takes all the abilities she had accumulated but ends up helping her towards the end. Also when she was at the academy when she had no idea about the tattoos she had gotten in trouble and as punishment she had to clean up the graveyard that was behind the school and when she was talking to one of her love interests a statue fell and was going to squash her but the guy dived and got her out of the way in time.
Also at one point she met the queen or princess of England who used to be a part of the academy whose power was to understand and speak and write every language. I think the academy gave the students missions but I'm not entirely sure. Also towards the end the girl and her friends are being stalked or something and they find a picture book and they all look like they have matured and grown up a bit except her. She looks the same in every picture and they find a locked room and they bust it open and it is covered in pictures of her and turns out she was a project and the stalker guy had made her immortal and that's how the first book ends.