According to the management company, doctors diagnosed Fredriksson with a brain tumor in 2002. Following her "aggressive treatment," Fredriksson began touring with Roxette again in 2009.
Seven years later, doctors "advised her to stop touring and focus on her health," the company said.
Gessle remembered Fredriksson as “an outstanding musician, a master of the voice, an amazing performer."
"Thanks for painting my black and white songs in the most beautiful colours," he said in a statement. "You were the most wonderful friend for over 40 years. I'm proud, honored and happy to have been able to share so much of your time, talent, warmth, generosity and sense of humor."
Fredriksson is survived by her husband, Mikael Bolyos, and two children, according to the management company.
Read more here or here.