Is the Turkish popstar Mustafa Sandal gay, bisexual or straight?

I am a big fan of Mustafa Sandal but my Bosnian friend said to me that he read in the newspaper, that he is gay. But I also heard that he got married, however several people say that he had a homosexual relationship in England while he was studying in 1998. What do you think about his sexual orientation? Is he gay, bisexual or straight?
He dances also like a gay in some of his video clips:

http://www.youtube.com/watch?v=-BEhZYWtZIM

http://www.youtube.com/watch?v=j6DQ9wDgwI0

http://www.youtube.com/watch?v=A_7WxA3QkmA