These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Avril Lavigne
Alternate Character Interpretation: Avril is a vampire. Specifically, the stranger from "I'm With You" turned her and Under My Skin was inspired by someone that she accidentally killed. "Here's To Never Growing Up" is her vampire anthem.
Fridge Horror: In the "Girlfriend" music video, the nerdy girl gets hit in the head with a golfball and falls in a decorative river. Those things are notorious for being bacteria-riddled, so one hopes she didn't get any in her mouth. And, later, she's still stumbling around, which means she probably has a concussion.
Her live performance of her song Tomorrow. The fact that she sang it in dedication to her grandfather who had passed away that same night, it really sets the bar.
True Art Is Angsty: Subverted. "Under My Skin" is disliked due to the amount of Breakup Songs and Darker and Edgier tone. Avril herself isn't too fond of it, claiming that "The Best Damn Thing" was her wanting to just have fun in music again