We have bad news news for fans of vocalist Gustavo Cerati of Soda Stereo. The Argentine rock star passed away today at age 55 of respiratory arrest at the ALCLA hospital in Argentina. Gustavo Cerati has been hospitalized since he fainted at a concert in Caracas, Venezuela, in 2010. It turned out to be a transient ischemic attack in which he had to have brain surgery due to a potentially fatal blood clot. He has been in a coma ever since.