Sia shows her love of music with this treble clef tattoo on her right ankle. Ironically, she can’t actually read sheet music! That hasn’t stopped her from become one of the biggest songwriters in pop music. She writes songs by trying out many different vocal melodies over an existing track, either one sent to her from a producer or played on the piano by her long-time collaborator Greg Kurstin. Once she’s created out a tune that she likes, she fits lyrics into it and producers add instrumental arrangements to fit with her melody.