" ▁was ▁" For ▁Wh om ▁the ▁Bell ▁T oll s " ▁by ▁Met all ica , ▁while ▁the ▁first ▁song ▁on ▁" True ▁Old ies " ▁was ▁" R ock ▁' n ' ▁Roll ▁Music " ▁by ▁The ▁Beat les . ▁This ▁change ▁made ▁W Z Z N ▁the ▁only ▁old ies ▁station ▁on ▁the ▁FM ▁d ial ▁in ▁Chicago . ▁The ▁air ▁talent ▁" The ▁Zone " ▁let ▁go ▁in ▁this ▁transition ▁included ▁W RC X ▁al ums ▁Fre ak ▁and ▁Sl ud ge , ▁and ▁W L UP - FM ▁al ums ▁James ▁Van ▁O sd ol , ▁Mark ▁Z ander , ▁and ▁Jimmy ▁Nov ak . ▁ ▁In ▁ 2 0 0 6 , ▁the ▁station ▁added ▁some ▁local ▁air ▁personal ities ▁who ▁were ▁previously ▁at ▁W J M K ▁when ▁it ▁was ▁an ▁old ies ▁station . ▁Event ually , ▁the ▁station ▁was ▁live ▁and ▁local ▁( which ▁included ▁hosts ▁such ▁as ▁John ▁L ande cker , ▁Dick ▁B ion di , ▁Greg ▁Brown , ▁and ▁D anny ▁Lake ) ▁except ▁for ▁over n ights , ▁when ▁they ▁would ▁continue ▁to ▁run ▁True ▁Old ies ▁Channel ▁programming . ▁In ▁ 2 0 0 7 , ▁W alt ▁Disney ▁Company ▁sold ▁its ▁ABC ▁Radio ▁radio ▁division , ▁including ▁W LS ▁( AM ) ▁and ▁W Z Z N , ▁to ▁Cit adel ▁Broadcast ing . ▁From ▁ 2 0 0 7 ▁to ▁ 2 0 0 8 , ▁the ▁old ies ▁format ▁was ▁modified ▁to ▁include ▁a ▁small ▁amount