Are Dickie Peterson and Fher Olvera both musicians?
Dickie Peterson: Richard Allan Peterson (September 12, 1946 – October 12, 2009) was an American musician, best known as the bassist and lead singer for Blue Cheer. Fher Olvera:  He is the secondary guitarist, composer, and lead singer for the Mexican rock band Maná, the most successful Latin American band of all time with over 40 million albums sold worldwide.
yes