▁they ▁would ▁switch ▁to ▁an ▁all - hol iday ▁format ▁from ▁Thanks g iving ▁to ▁Christmas . ▁The ▁produ cers ▁of ▁the ▁show ▁picked ▁up ▁on ▁this ▁and ▁beginning ▁that ▁year , ▁AT 1 0 ▁would ▁dev ote ▁the ▁last ▁six ▁programs ▁of ▁the ▁year ▁prior ▁to ▁Christmas ▁to ▁the ▁music ▁of ▁the ▁season . ▁The ▁last ▁two ▁weeks ▁would ▁consist ▁of ▁a ▁two - week , ▁si xty ▁song ▁count down ▁of ▁the ▁best ▁Christmas ▁songs ▁of ▁all ▁time ▁that ▁would ▁conclude ▁around ▁the ▁week ▁of ▁Christmas . ▁The ▁regular ▁week ly ▁count down ▁would ▁be ▁put ▁on ▁hold ▁until ▁January , ▁with ▁the ▁special ▁Christmas ▁count down ▁followed ▁by ▁the ▁year ▁end ▁top ▁ 3 0 . ▁ ▁Later ▁years ▁Kas em ▁continued ▁to ▁host ▁American ▁Top ▁ 4 0 ▁concurrent ly ▁with ▁both ▁AT 2 0 ▁series ▁until ▁the ▁week end ▁of ▁January ▁ 3 , ▁ 2 0 0 4 . ▁After ▁that , ▁he ▁c eded ▁the ▁hosting ▁position ▁to ▁Ryan ▁Se ac rest ▁and ▁signed ▁a ▁new ▁contract ▁to ▁continue ▁hosting ▁both ▁of ▁the ▁adult ▁contemporary ▁count down s . ▁ ▁In ▁ 2 0 0 4 , ▁Prem iere ▁Network s ▁launched ▁a ▁version ▁of ▁AT 4 0 ▁for ▁the ▁same ▁hot ▁adult ▁contemporary ▁stations ▁that ▁AT 2 0 ▁had ▁been ▁target ing . ▁Although ▁such ▁a ▁move ▁made ▁AT 2 0 ▁redundant , ▁Prem iere ▁continued ▁to ▁offer ▁Hot ▁AC ▁count down s ▁hosted ▁by ▁both ▁Case y ▁Kas em ▁( AT 2 0 )