Cello metal band Apocalyptica will be performing at Royal Oak Music Theatre on Tuesday, May 22 at 7 p.m. Apocalyptica is made up of classically-trained cellists Eicca Toppinen, Paavo Lötjönen, and Perttu Kivilaakso (all three of whom are graduates of the Sibelius Academy in Helsinki), drummer Mikko Sirén, and vocalist Franky Perez. The band’s debut studio album was based on their formation: playing Metallica covers on the cello. Thus, the name of their first album was Plays Metallica by Four Cellos and consisted only of Metallica covers played on the cello. Since then, the band has released a total of eight albums. Tickets are $35. For more information, visit royaloakmusictheatre.com.