The Sk8er Boi hitmaker, who recently recorded a track with Manson for her upcoming album, Bad Girl, shocked fans last June (12) when she stepped out with an edgy shaved hairdo, complemented by magenta and green highlights.
And Lavigne reveals the hairstyle, which has since been copied by the likes of Rihanna and Miley Cyrus, was designed by the 44 year old while they were hanging out backstage at one of his concerts.
She tells MTV.com, "I had wanted to shave the side of my head for quite some time, and I used to put it in a braid there (side of her head) and so it was kind of like shaving it. And then one night... we were hanging out backstage and we were with his band having a few drinks and I was like, 'Let's shave my head. I'm ready; let's do this!'
"He's like that, though. He has fun. He wears his makeup; his wardrobe is very visual. I like his style."