Then I got it and there was no Angelic Pretty tag on/in it! I asked the seller and she had no idea, because she bought it second hand herself and didn't think about tags. It didn't fit her, so she sold it again.
Now here is my question: You know if there are some AP berets that don't have tags? Do you recognise this beret from somewhere and can say that it is from AP or not?
Please note: I'm NOT accusing the girl who sold it!! I really think she had no idea. But we both would like to know if this is authentic or not!
edit: Why didn't I think of it earlier? I looked at pupe and found these in the Angelic Pretty category:
http://pupe.ameba.jp/item/8flS-D7HuFpN/Y1maAJnOYbmp/
http://pupe.ameba.jp/item/Dqc9WflUi8Eu/avzDJ_pQy82f/
http://pupe.ameba.jp/item/bx5XykL2aGQo/MKyD3SmqXD6-/
http://pupe.ameba.jp/item/Li0Sf09dCZfu/Tfc5Jv6Lk_0k/
So I think everything is ok with this beret!!! Thank you for your help!