At 16 years old, Billie Eilish is doing what most young artists dream of their whole lives. With the release of “Ocean Eyes,” the pop/R&B crossover had everybody wondering who was the voice behind the captivating breakout. Billie's since moved smoothly from an average high-schooler to a pop sensation, and there's almost no one else out there with as much raw promise in their future. —Shirley Ju