▁of ▁ 1 9 8 0 s ' ▁hits ▁and ▁a ▁focus ▁on ▁old ies ▁from ▁ 1 9 6 4 ▁to ▁ 1 9 7 9 . ▁The ▁station ▁continued ▁to ▁play ▁a ▁couple ▁pre - 1 9 6 4 ▁old ies ▁per ▁hour . ▁On ▁June ▁ 1 9 , ▁ 2 0 0 8 , ▁Cit adel ▁announced ▁that ▁W Z Z N ▁would ▁become ▁once ▁again ▁W LS - FM . ▁The ▁W Z Z N ▁call ▁sign ▁was ▁dropped ▁at ▁Mid night ▁on ▁June ▁ 2 5 , ▁ 2 0 0 8 , ▁and ▁as ▁of ▁ 1 2 : 0 1 ▁AM ▁on ▁June ▁ 2 6 , ▁ 2 0 0 8 , ▁the ▁station ▁has ▁officially ▁been ▁known ▁as ▁W LS - FM . ▁The ▁idea ▁was ▁to ▁bring ▁back ▁the ▁her itage ▁of ▁W LS ▁and ▁its ▁old ▁Top ▁ 4 0 ▁format ▁and ▁j ing les . ▁The ▁station ▁was ▁then ▁brand ed ▁as ▁" 9 4 . 7 ▁W LS - FM " ▁with ▁the ▁s log an ▁" Ch icago ' s ▁Great est ▁H its ▁Of ▁All ▁Time ." ▁Cit adel ▁merged ▁with ▁C um ulus ▁Media ▁on ▁September ▁ 1 6 , ▁ 2 0 1 1 . ▁ ▁Sh ift ▁to ▁classic ▁hits ▁On ▁October ▁ 1 , ▁ 2 0 1 2 , ▁W LS - FM ▁modified ▁their ▁old ies ▁format ▁to ▁a ▁classic ▁rock - lean ing ▁classic ▁hits ▁format . ▁The ▁Scott ▁Sh