"Warrior" is the twelfth and last track from Avril Lavigne's sixth studio album, Head Above Water (2019). It was written in 2015.
Background
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On February 5, Lavigne wrote about the song:
"This is one of the first songs I wrote for the album after Head Above Water. They are both about the health battle I continue to fight every day. I hope my songs can help you find strength if you need it...
I produced this track, Chris Baseford engineered, Chad and Travis Clark helped me finish it. I had a lot of great people around me helping me to make music again".