What song is Christine Singing Backstage?

Hi -

Just after Christine is left alone in her backstage "bedroom" by the kindly Jean-Claude, she's so happy to be at the opera/have a place to stay that she starts to sing as she bustles around, picking up dusty vases, admiring the ambience, etc.

She then drifts onto the empty stage, still humming the song to herself.

It's while she's singing this that Erik first hears her voice. He's in front of a mirror (masked, of course) and is naturally enthralled...

The first lyrics go thus:

"Dernier chez mon pere, les..."

Alas, that's all I can decipher, though the word "jolie" is in there somewhere. It has a pretty, upbeat tone, which matches her hopeful mood at the moment.

I've always love this tune - does anyone know the title, source and/or where/if I could find a copy of anyone singing it?

Merci!!