Ahmet Serhat Hacıpaşalıoğlu (b. 24 October 1964) is a Turkish singer, songwriter, producer, and TV presenter. He rose to fame by hosting the game show Riziko! in 1994. In 2016 and 2019, he represented San Marino in the Eurovision Song Contest with the songs "I Didn’t Know" and "Say Na Na Na" with the latter giving San Marino its best result at nineteenth place.