We've long loved the artist for her quirky personality, gratifying songs and emotional vocals. But did you know that in addition to being an unconventional pop star, she's also a one-woman hit factory, responsible for penning tons of our favorite chart-toppers?
Here, seven things you probably didn't know about the elusive, brave and inspiring Sia.
• She got her big break in 2005. Her song "Breathe Me" was featured in the last scene of Six Feet Under and immediately went viral, with sales reaching 1.2 million.
• She's probably penned your favorite song. Sia has written and co-written countless pop hits, including Flo Rida's "Wild Ones," Eminem's "Beautiful Pain," Beyoncé's "Pretty Hurts," Britney Spears' "Perfume" and Ne-Yo's "Let Me Love You".
• She wrote David Guetta's "Titanium" in 40 minutes. And Rihanna's "Diamonds" in only 14 minutes.
• Her latest album, 1000 Forms of Fear, is her first record in ten years. It marks a triumphant return from songwriting to performance. It also earned her four Grammy nominations.
• She openly disavows the stresses of fame. She even went so far as to pen an anti-fame manifesto for Billboard magazine.
• Beyoncé had this to say about her: "Sia is such a genius. The second I heard the song ["Pretty Hurts"], I'm like, I have to sing this song. I don't care how hard I have to fight for the song, this is my song!"