I was trying to understand something. I wrote some English with the help of google. I certainly had trouble with #4. Hopefully, someone can check this...

1. Annesi Hollanda babası Antakya doğumlu olan Atiye, 22 Kasım 1988’de Almanya’nın Bremen şehrinde doğdu.

Her mother is Dutch, her father is born in Antakya, Atiye was born November 22, 1988 in Bremen, Germany.

2. Küçük yaşlarda piyano ve dans derslerine başladı.

At a young age, her piano and dance lessons started.

3. 8 yaşında Almanya’dan Amerika’ya taşındı, burada 6 ay yaşadıktan sonra İzmir’e yerleşti.

At the age of 8, she moved from Germany to USA, there she lived 6 months before settling in Izmir.

4. İzmir’den Almanya’ya geri dönüşü öncesi 1 yıl Hollanda’da CKE okulunda sanat eğitimi alan Atiye, Bremen’de şan derslerine başladı.

Before returning to Germany from Izmir, she started 1 year in Holland’s CKE art education, then in Bremen she started singing lessons.

5. Almanya’da lise eğitimini tamamlayan sanatçı 2008 yılında Türkiye’ye geri dönüş yaptı.

After her highschool education in Germany, in 2008 she returned to Turkey

2. Küçük yaşlarda piyano ve dans derslerine başladı.

I guess this can be translated as: 

She started taking piano and dance classes at a very young age.

Doesn anyone have any idea on 4). ? I couldn´t get the timeline between Izmir, Holland and Germany.

That’s a correct translation. However, that might be worded in a different way , such as :

4. İzmir’den Almanya’ya geri dönüşü öncesi 1 yıl Hollanda’da CKE okulunda sanat eğitimi alan Atiye, Bremen’de şan derslerine başladı.

Atiye, who studied Art at Holland’s CKE school for the period of one year before she returned to Germany from Izmir, started singing lessons in Bremen.

* Yes, The timeline between events is not very clear but what I understand is ;  

First ,she was living in İzmir since she moved to İzmir from America [from what the previous story tells us] and while she was living İzmir she went to  Holland to study Art for one year , and then came back to İzmir obviously since her last move was from İzmir to Almanya.