SIENNA SPIRO

Like many would-be singers, Sienna Spiro has put in work interpreting songs on social media with her own soul-pop-affected voice. Unlike most, though, that work paid off in a sudden burst of success, including the minor U.K. hit “Maybe.” and the debut EP Sink Now, Swim Later. She continued releasing singles, finding success with standouts like "You Stole the Show" and "Die On This Hill."