In 1988 CD's outsell vinyl albums for the first time, but cassette tapes remain as the top selling medium for music. Atlantic Records holds a 40th Anniversary concert at Madison Square Garden with many past and present label artists including a reunited Led Zeppelin. Acid house music takes off in the UK. Motown Records is sold to MCA. Two fans are crushed to death during the Guns n' Roses set at the Monsters of Rock Festival in Castle Donington, UK. Rock and Roll pioneer Roy Orbison dies. Rap/hip hop and alternative music continue their growth.