Topi Sorsakoski, real name: Pekka Erkki Juhani Tammilehto (27th of October 1952, Ähtäri, Finland - 13th of August 2011, Seinäjoki, Finland) was Finnish singer. He started his career with his brother Antti Tammilehto in the band called Kalle Kiwes Blues Band. After that in the 80's he played in the band called The Boys as a guitarist and joined Agents. In the Agents he became famous as a vocalist. Among others he sang Olavi Virta's songs. He began his solo career with the band called Kulkukoirat (Could be translated as Hound Dogs).