"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, 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.
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