Sia has written hits for Britney Spears, Beyonce, Katy Perry and so many more huge stars.  She wasn't just being humble when she admitted she never had any desire to be famous.  Even though she finally decided to keep one of her hits for herself she refused to show her face while performing it on Ellen!

Watch her captivating performance of 'Chandelier'


p.s.- the little girl dancing is BRILLIANT!!