Billie Eilish is only 15 years old, but things are coming together quickly for her, and the Los Angeles-based artist's music and presentation are already sounding and looking polished and ready for the spotlight. "Ocean Eyes" is the song that put things in motion—it now has about 15 million plays on Spotify—but her video for "Bellyache" is what got us hooked. Billie makes sweeping pop music with an edge, and whether it's in the production, the delivery, or the lyrics, she's always keeping things interesting and far more complex than you'd expect from such a young artist.

Billie's dont smile at me EP comes on August 11, and "COPYCAT" is the latest song leading up to the project. Listen below, and catch her on her first-ever headlining tour this October. See the tour dates here.