Karla Álvarez ( ; ( October 15 , 1972 -- November 15 , 2013 ) was a Mexican actress best known for her roles including `` Maria Mercedes '' and `` Alma Rebelde '' and as a contestant for Big Brother VIP in 2003 .
Karla Mercedes Álvarez Báez ( 15 October 1972 -- 15 November 2013 ) was a Mexican actress . She was best known for her roles including `` Maria Mercedes '' and `` Alma Rebelde '' and as a contestant for `` Big Brother VIP '' in 2003 .