Sia has steadily been releasing single after single with “Unstoppable” marking the sixth song we’ve heard from her upcoming album This Is Acting. Perhaps the album’s title alludes to the song’s lyrics ...

Unsurprisingly, attendees at the 2025 Out100 celebration knew every lyric to "Unstoppable" and eventually started to sing along with Sia herself. "Your harmonies were so nice," the pop star told the ...