Gustavo Adri?n Cerati Clark (born August 11, 1959) is an Argentine guitarist, singer, songwriter and record producer of rock music. During the 1980s and 90s he was a member of the Argentine rock group Soda Stereo, along with Charly Alberti and Zeta Bosio. In the early 90s, with Amor Amarillo, he pursued a solo career. His work both as a solo artist and with Soda Stereo positioned him as one of the most influential rock musicians of Latin America. He is currently in a coma after suffering a stroke on May 15, 2010.