Like yesterday because I don’t speak the language I don’t have much info about each one.
I can say that all of the songs are very listenable though.

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Gülben Ergen is a popular singer and sometimes actress. This is a very traditional influenced sound:

» Gülben Ergen (feat. Ege Cubukcu) – Avrupa [SONG OFFLINE] video

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Sercan is a Turkish singer living in Dortmund. In this one he has the elements of a perfect football/music song with a crowd, some commentary from a match and a chant thrown in there. I like the driving, danceable beat on this one, very catchy:

» Sercan feat Levoe Mevcut – Turkiyem (Milli Mars Euro 2008) video

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Muhabbet is another German based (Berlin this time) Turkish singer. He one is again like Sercan's above, very catchy. It also has the crowd and the commentary. I like this one too:

» Muhabbet - Oh Milli Takim Ole Ole 2008