Masters of Rock is a metal festival in Vizovice, Czech Republic. The main styles represented at this festival are power metal, speed metal, and heavy metal. In the past, the festival has featured bands such as Judas Priest, Motörhead, Slayer, Helloween, Uriah Heep, Manowar, Dream Theater, Nightwish, Accept, Anthrax, Sweet, Twisted Sister, Europe, HammerFall, Stratovarius, Gamma Ray, Rhapsody of Fire, Sabaton, Kreator, Edguy, Rage - also with symphonic orchestra, Tarja Turunen, Apocalyptica, Within Temptation, Children of Bodom, Avantasia, Sebastian Bach, Behemoth, Amon Amarth, and many more. The 2005 attendance was over 20,000, the 2006 one over 25,000 and finally the 2007 was over 30,000. The festival is held every summer and the Winter morphosis takes place in November in the town of Zlín. Since 2010 the main stage of summer festival is named after Ronnie James Dio, who died earlier that year.

Twisted Sister was an American heavy metal band formed in 1972, originally from Ho-Ho-Kus, New Jersey, and later based on Long Island, New York. Their best-known songs include "We're Not Gonna Take It" and "I Wanna Rock", both of which were associated with music videos noted for their sense of slapstick humor.