I Am Not Jessica Chen by Ann Liang

Jenna Chen has spent her life in the shadow of her flawless cousin. Jessica Chen is so smart she gets the top score on every test. Jessica Chen is so beautiful people stop in the hallway to stare at her. Jessica Chen is so perfect she got into Harvard.
And Jenna Chen will only ever be a disappointment.
So when Jenna makes a desperate wish to become her cousin, the last thing she expects is for it to come true—literally. All of a sudden she gets to live the life she’s always dreamed of . . . but being the model student at cutthroat Havenwood Private Academy isn’t quite what she’d imagined. Worse, people seem to be forgetting that someone named Jenna Chen ever existed. But isn’t it worth trading it all away—her artistic talent, her childhood home, even the hope of golden boy Aaron Cai loving her back—to be Jessica Chen?