"Hangover Music Vol.VI" was Black Label Society's fifth studio album (and sixth overall), originally released in April 2004. The album is much more mellow than the band's other releases and in many ways harks back to Zakk's solo album "Book Of Shadows". The tracks include a piano driven version of Procol Harum's classic "A Whiter Shade Of Pale", a song that Zakk has played a number of times in "unplugged" sets over the years.