While “Titanium” and “Wild Ones” remain her biggest singles as a vocalist, and her songwriting has given Rihanna (“Diamonds”) and Ne-Yo (“Let Me Love You (Until You Learn to Love Yourself)”) massive hits, Sia’s best song could still arguably be her 2004 breakthrough single (thanks in large part to Six Feet Under) “Breathe Me”. That song poured vulnerability, as Sia Furler pleaded to her subject to give her a much needed shot of life. Now, some 10 years later, Sia has developed a thick skin, no longer in need of someone else’s breath. She’s breathing on her own, and she’s soaring, as “Chandelier” marks a triumphant return for Sia, featuring one of the most acrobatic and life-affirming choruses of 2014. “I’m holding on for tonight / Won’t look down, won’t open my eyes,” she sings during the chorus; she can rest assured that if she does open her eyes, all she’ll see are a million hands waiting to catch her. Not that she needs any help sticking the landing.