1000 Forms of Fear is the sixth studio album by Australian singer Sia. It was released on 4 July 2014 by Monkey Puzzle and RCA Records worldwide, and Inertia Records in Australia. Primarily an electropop album, the record also incorporates influences from reggae and hip hop. Lyrically, the record showcases Furler struggling to deal with drug addiction and bipolar disorder.

1000 Forms of Fear received mostly positive reviews from music critics, who praised Furler's vocals as well as the album's lyrical content. The album debuted at number one on the US Billboard 200 with first-week sales of 52,000 copies. As of January 2015, it has sold 177,000 copies in the United States, according to Nielsen SoundScan. The release also charted atop the charts of Australia and Canada, and reached the top five charts of Denmark, New Zealand, Norway, Sweden, Switzerland, and the United Kingdom.

The album spawned four singles. Its lead single, "Chandelier", released in March 2014, became a worldwide top-10 single; it also peaked at number eight on the US Billboard Hot 100, becoming the first song by Furler to enter the chart as a lead artist. "Big Girls Cry" was released in June 2014. Furler's solo version of "Elastic Heart", which was originally a collaboration with The Weeknd and Diplo, was released in January 2015. "Fire Meet Gasoline" was released in June 2015.

To promote the project, Furler appeared on a number of TV shows, including The Ellen DeGeneres Show and Jimmy Kimmel Live!, where she recruited Maddie Ziegler as her persona onstage, during 2014 and 2015. 1000 Forms of Fear earned Furler three ARIA Music Awards in 2014 and was listed as one of the best albums of 2014 by several publications, including The Boston Globe and Rolling Stone. The lead single "Chandelier" received four Grammy nominations for Song of the Year, Record of the Year, Best Pop Solo Performance, and Best Music Video.