When she was 18 years old, Avril Lavigne met American singer Marilyn Manson at one of his concerts, and eventually they became friends [REF].
Later, the singer revealed that she did a song with Manson, confirming to Billboard about the collaboration, saying, "I wrote this song called 'Bad Girl', and it's like darker and heavier, it's one of the rock tunes on the record."[REF]