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.[1][2][3] 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.

[15][16] Billboard's Jessica Katz said the song is reminiscent of work by Rihanna and "clearly follows in the lineage of emotional barn-burners that have become [Sia's] trademark".

[8] Michelle Lulic of Bustle said its lyrics "make it clear is the female empowerment anthem you had no idea you were missing from your life.

"[17] Furthermore, Lulic wrote, "While ... the song was not initially written for [Sia], it certainly doesn't take away from [her] ability to handle the powerful ballad and catchy lyrics.

[19] "Unstoppable" has charted in the top five of Adult Contemporary for a record 84 weeks, all consecutively since the ranking dated October 8, 2022.

In 2024, "Unstoppable" became the fourth song in history to spend 100 non-consecutive weeks on @billboard's Adult Contemporary Chart.

[93] Hinder and No Resolve's cover of Unstoppable reached number 1 on Billboard's Hard Rock Digital Song Sales on the week of May 27, 2023.