Def Leppard's new album, Drastic Symphonies, recorded with London's Royal Philharmonic Orchestra, is number-one for the second straight week on Billboard's Classical and Classical Crossover charts.
Guitarist Vivian Campbell says the title comes from having to drastically remix some of the songs.
Campbell says the recording process at London's Royal Albert Hall was "magical," especially being in the same room as the Royal Philharmonic Orchestra.
Def Leppard are on a European tour with Motley Crue, with stops in Finland on Friday and Norway on Sunday.