Mustafa Sandal (born 11 January 1970), also known as Musti, is a Turkish pop music singer-songwriter, record producer, dancer, businessman, and actor whose albums have sold over 20 million copies worldwide and have achieved diamond, platinum, and gold certifications in Turkey. Regarding his critical and commercial success, Sandal is often considered to be one of the most important singers from Turkey since he emerged in the early 1990s with the revival of Turkish pop music. Born and raised in Istanbul, he primarily studied at Dost Koleji in Tarabya and at Collège du Léman in Geneva, and briefly attended University of New Hampshire's School of Business and Economics in the United States before receiving his BA degree in Management from American College of London. His vocal abilities captured the attention of several different recording artists and following his graduation, Mustafa Sandal became involved in song writing also for notable singers. He is extremely fluent in English, French, Italian, and Turkish.

Musti is famous in Europe for his songs "Moonlight", "Araba", and "İsyankâr" in such European countries as Austria, Belgium, Bosnia and Herzegovina, France, Germany, and Switzerland. He is also known in the United States, Uzbekistan, Russia, and Azerbaijan. His brother-in-law is Mirsad Türkcan, the first Turkish basketball player to play in the NBA.