Members of GUNS N' ROSES, AEROSMITH, KISS, MÖTLEY CRÜE, TWISTED SISTER and JUDAS PRIEST are among the rock musicians and scores of other artists who reacted on social media to the passing of Chuck Berry, a music pioneer often called "the Father of Rock 'n' Roll," who died Saturday at his home outside St. Louis. He was 90 years old. Berry's death was confirmed by the St. Charles County Police Department in Missouri.