Sia Kate Isobelle Furler (born 18 December 1975) is an Australian singer, songwriter and music video director. She started her career as a singer in the acid jazz band Crisp in the mid-1990s in Adelaide. In 1997, when Crisp disbanded, she released her debut studio album titled OnlySee in Australia. She moved to London, England, and provided lead vocals for the British duo Zero 7. In 2000, Sia released her second studio album, Healing Is Difficult, on the Columbia label the following year, and her third studio album, Colour the Small One, in 2004, but all of these struggled to connect with a mainstream audience.
Sia relocated to New York City in 2005 and toured in the United States. Her fourth and fifth studio albums, Some People Have Real Problems and We Are Born, were released in 2008 and 2010, respectively. Each was certified gold by the Australian Recording Industry Association and attracted wider notice than her earlier albums. Uncomfortable with her growing fame, Sia took a hiatus from performing, during which she focused on songwriting for other artists, producing successful collaborations "Titanium" (with David Guetta), "Diamonds" (with Rihanna) and "Wild Ones" (with Flo Rida).
In 2014, Sia finally broke through as a solo recording artist when her sixth studio album, 1000 Forms of Fear, debuted at No 1 in the U.S. Billboard 200 and generated the top-ten single "Chandelier" and a trilogy of music videos starring child dancer Maddie Ziegler. In 2016, she released her seventh studio album This Is Acting, which spawned her first Billboard Hot 100 number one single, "Cheap Thrills". The same year, Sia gave her Nostalgic for the Present Tour, which incorporated dancing by Ziegler and others and other performance art elements. Sia wears a wig that obscures her face to protect her privacy. Among the accolades received by Sia are ARIA Awards and an MTV Video Music Award. Her eighth studio album, first Christmas album, and debut album with Atlantic Records was released in 2017. It was titled Everyday Is Christmas and was preceded by the single "Santa's Coming for Us". The album was reissued in 2018 with three bonus tracks.