Sia is easily the most intriguing pop star working today. The notoriously fame-adverse singer manages to be everywhere and nowhere all at once. When she performs live or appears on the cover of magazines, her face is concealed. She does not appear in the video for her monster single, “Chandelier.” She’s written some of the biggest hits of the last five years, but lets her more famous counterparts sing them. By now, her past struggles with addiction and bi-polar disorder have been well documented, but if you want to hear about it in her own words, then look no further than her appearance on yesterday’s Howard Stern Show. There are few interviewers who are as compassionate, clever, curious, and attentive as Howard Stern, and it’s apparent in the way that the normally reclusive singer opens up to him. She also delivers one of the most moving renditions of “Chandelier” you’re likely to hear. Savor it. The full interview is also worth a listen, and it’s below that.