They were very famous when I was little. They even had a TV series. All four are graduates of the dance conservatory. I still think they have good songs. And unfortunately they are still not together at the moment. But Gülçin (the blonde one) is still singing. Here are some of them: Turkish: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-LLQqHc98HFc.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-tUDD7LA_sJQ.html English: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-sEHv67C8qoo.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-xLwhW1N-pY0.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-FW2FUnL_W2E.html -The tone of her voice is strong and beautiful.