Katie's life isn't exactly ideal. Her parents have just divorced, and she's living in a new apartment with her mom and older sister. Then, a recording of Katie singing at home goes viral, and she becomes a superstar virtually overnight. As the video views rack up and stadium tours beckon, Katie rushes headlong into celebrity status without checking whether her friends and family are along for the ride. And when you're not looking where you're going, you tend to trip.