At the beginning of "Fighter", the guitar sound was arranged in the chord progression of Em – G/D – D – C – Em/B – B – Am – C/G – G – B7. Aguilera speaks the lyrics, "After all you put me through, you'd think I'd despise you / But in the end, I wanna thank you, 'cause you made me that much stronger" on the guitar theme by Dave Navarro. Lyrically, Aguilera wants to thank the man who did her wrong rather than insult him, because he helped make her stronger and work harder, thus making her a fighter. At the chorus, she sings, "'Cause it makes me that much stronger/ Makes me work a little bit harder/ Makes me that much wiser/ So thanks for making me a fighter". The chords in the guitar part are E5 – F5 – G5 – A5 – B5 − C5 – B5 – A5 – G5 – F5 – E5. She continues, "Made me learn a little bit faster/ Made my skin a little bit thicker/ Makes me that much smarter/ So thanks for making me a fighter". The lyrics of "Fighter" have been recognized as "empowering".