What’s really interesting about this track is that Sia, who ended up singing it, never planned on actually being the one on the final version. At that time, this Australian singer-songwriter wanted to stay out of the spotlight and just focus on making music behind the scenes.

For “Titanium,” she only recorded a guide vocal, but David Guetta was like, “Nope, I’m just gonna use this,” and released it without properly getting Sia’s permission. Naturally, Sia was pretty pissed off at first, but once the song became a massive hit, well, that kinda cooled her down.