It's misleading to say that she has no roots/background at all:
""I speak a little bit of Moroccan dialect because I lived in Morocco for about a year, but I still cannot communicate with people in Arabic in Lebanon. Eventually I'd like to work on that," she says."
^From the same article. While I understand Moroccan Arabic is very different, it's not like she's a beginner that's had no Arabic exposure at all.
And a lot of comments I saw on it were pretty unhappy about her, along the lines of "it's Arabs Got Talent - she shouldn't win/be there/etc."