Rihanna first learned about Anema's plight in February 2009, when she saw the moving video Anema's best friend, Isabelle Huurman, and her mother, Karen Detrick, made appealing for donors to save Anema. Rihanna honored Anema's best friend, Isabella, for her efforts for trying to save her best friend at a DKMS Gala on May 7, 2009. Jasmina Anema eventually received her transplant on June 11, 2009, but died on January 27, 2010. In September 2009, Rihanna performed at Jay-Z's "Answer to Call" concert, which paid tribute to the police officers and firefighters who died on the September 11 attacks.