Original sentence: The show was propelled by the excitable performances of Santeri Ahlgren and Eeki Mantere (who had already died in April as the show was filmed primarily in the spring) as well as through the support of popular Finnish musician Remu Aaltonen of Hurriganes (himself being a gypsy)
Edited sentence: The show was propelled by the excitable performances of Santeri Ahlgren and Eeki Mantere (who had already passed away in April as the show was filmed primarily in the spring) as well as through the support of popular Finnish musician Remu Aaltonen of Hurriganes (himself being a gypsy)