"Bad Reputation" about a slut? well, yeah, I suppose it can mean that, and it probably is the original meaning of the song (I wouldn't know, I haven't looked into it) but the words are so vague it can mean anything, really. I mean, if you listen to the song, it could also fit a small group of pirates who don't care about their reputation and just want to have fun -oh, waitaminute!
I feel indifferent about Lavigne, I've never bought any of her CDs and the only songs I've heard of her are her singles in the radio whenever it came up or similar occurrences.
I trust Oda though. The last time he choose an artist for a movie, Mr.Children, I liked the song "Fanfare" of Strong World.
I'm not saying Lavigne will do an awesome job, I do think "Bad Reputation" does kinda fit. I'm not so sure about "You Remind me" though. But, like I said, I do trust Oda, so I'll give him a vote of confidence and wait to hear the songs on the movie, before I decide whether it was a good or a bad choice to call Avril Lavigne..