I love this thread.
OK, dating the picture again -- Jessica's hairstyle and overall appearance date it as 2003, not that long after the Stars à Domicile episode (which aired in August 2003). Both her clothes and Alizée's indicate it was not during filming of the show however, so it must have been after. I'm going to guess some time between August '03 and February '04.
Any idea who the other two are?