Rock group, Def Leppard, from Sheffield, England, released their third studio album on this date January 20, in 1983.  'Pyromania' featured new guitarist for the band, Phil Collen and was produced by Robert John "Mutt" Lange (Shania Twain's ex husband).  The album produced such hits as "Photograph", "Rock Of Ages",and "Foolin".  Over 10 million copies have sold in the US.