"Unstoppable" is a song by Australian singer-songwriter Sia, taken from her seventh studio album This Is Acting (2016). The song was written by Sia and Christopher Braide, and produced by Jesse Shatkin. It was released as the album's final promotional single on 21 January 2016. In July 2016, a new version of the song was made for Gillette's 2016 Olympic ad campaign, "Pretty Isn't Perfect", which features a verse from American rapper Pusha T.[2][3][4] In 2022, the song was released to radio as an official single in the United States after gaining popularity through commercials and video-sharing app TikTok.[5] "Unstoppable" reached one billion streams on Spotify at the end of 2023, becoming the third Sia song to achieve this. At the APRA Music Awards of 2024, 2025 and 2026, the song won Most Performed Australian Work Overseas.[6][7][8]