Billie Eilish - "Bellyache"
You may think that you have "Bellyache" pretty well understood during the first minute and a half, with it's entrancing guitar, simple percussion, and dreamy vocals. But then it becomes abundantly clear that you were wrong, as Billie Eilish suddenly changes tunes, ditches the guitar, and introduces deep, dirty bass throughout the chorus before returning to the original theme as if nothing had happened. It's reasons like this why Eilish has gained more and more attention since her debut single "Ocean Eyes" last year, and why she will continue to gain recognition and someone to watch.