With her chart-topping debut album ‘Visitor,’ a sold-out world tour, and comparisons to Adele and Nancy Sinatra, singer-songwriter #SiennaSpiro is on a meteoric rise. Here, the virtuoso gives InStyle an into her music’s charming imperfections, why music is her lifeline, and her obsession with the ‘60s as she sits down to #FaceTheMusic for our September Issue.