Gustavo Cerati is the singer of a very popular Argentinian 80's band called Soda Stereo. Despite have a very distinctive sound from the time they were widely ignored here in Spain (And still this days).
Gustavo suffered a cerebral stroke after a concert in Venezuela in May 2010. He remains in coma since.
I always thought he was a very underrated guitarist.
Here is a rare collaboration with the Colombian band Aterciopelados:
We really hope he gets well very soon.