This song means, "I really missed myself" and she writes it after her divorce with an english speaking pop-star and for the longest time this was one of my banner songs. In the lyrics (which I couldn't get on the web for some reason) she talks about how it started out, how it was just a crazy love story and then it degenerated into something that caused her misery and made her feel like she betrayed herself, and now that she's free again she promises that if there's anything left in her soul, she offers it to other ppl and that's how she wins forgiveness of herself. The chorus refrain has this nice minor six interval-sol sol sol me re do sol--("je me suis tellement manquee" The neat thing about her music is that she's a classically trained pianist and so it really adds something to her songs.
PS that concert tonight was sweet! I want to go rent some of that music and blog on it sometime!