Okay, times up!
helene2.jpg
helene3.jpg
Alizée is Anna-lou's godmother. (marraine means godmother) She has the baby tagged @helene2a this year with the caption "1 an" and a year ago she mentioned #annalou and tagged @helene2a.
From the reportage video Alizée introduces Helene as her friend.
helene1.jpg
So, I conclude Anna-lou is Helene's daughter.