But unlike you, I listen to her music because I like it, not because she's just very 'hot'
Haha, that was a slight exaggeration my part. It started with that, but I like a lot of her music. My top ten favorites by her are:
1) Nobody's Home
2) My Happy Ending (I have a clean version)
3) Anything But Ordinary
4) 4 Real
5) Stop Standing There
6) Black Star
7) When You're Gone
8) Keep Holding On
9) Falling into History
10) Why
Of course, it depends on the day and how I feel, but that is what I think most of the time.
I don't have any of her CDs, but I have almost 50 songs by her on my computer, and I think I have you beat with the wallpaper.(Probably 99% Avril Lavigne, with 1% being Detroit Lions Wallpaper, which is my favorite professional football team) I was actually going to use an Avril Lavigne picture as my avatar, but you beat me to it
I haven't been to any concerts because some of her more popular music has a LOT of language and I would rather not have such lyrics stuck in my head

My uncle has been hinting at getting me tickets sometime though. I'd go if he did, but never otherwise.
I was going to buy a poster, and my brother was thinking about buying one for me for Christmas, but I didn't want any in the end because they wouldn't find my room's theme. (It is kind of an classy-old-style room)