Interestingly, Sia originally wrote the song with other artists in mind, including , Mary J. Blige , and Katy Perry [1, 6, 13]. Perry famously turned it down, feeling the song was already perfect with Sia's demo vocals and didn't want to duplicate the sound of her own hit, "Firework" [6]. Guetta agreed, ultimately using Sia's raw, emotive demo as the official version, which Sia allowed on the condition that she would not have to appear in the music video or promote the track [6, 23].

: A reference to the classic childhood rhyme, emphasizing that while physical or verbal pain exists, it does not define or defeat the speaker [5, 31]. The Story Behind the Vocals

: This repeated affirmation serves as a declaration of defiance against life's challenges [9, 14].

: This opening line suggests a choice to shut out toxic voices and emotional noise to protect one's peace [12, 31].

: A metaphor for verbal or emotional attacks that fail to cause harm because the protagonist is "bulletproof" [5, 19, 31].

The lyrics, penned by Sia, are rich with imagery representing emotional conflict and personal fortitude [24]:

, a global dance-pop anthem by French DJ David Guetta featuring the powerful vocals of Australian singer-songwriter Sia , was released in 2011 as part of Guetta's fifth studio album, Nothing but the Beat [17]. Core Theme: Inner Strength and Resilience