When I need to make a quick but quality mp3 of a Youtube video, this site has been great:
http://www.video2mp3.net
I noticed from your list that you left out all of Alizee's live performances on Les Enfoires over the years, and she's been doing the charity TV broadcast for almost a decade. Is it because they aren't solo performances? Her voice was superb on these shows, and they do not seem to be lip-sync or playback. Check out a few:
She's also done a bunch of duets with Jenifer and others: