Sirens A Blair'n: Cumulus' WZCY/Harrisburg and WXTA/Erie, PA are among the Nash FM-branded stations that will add America's Morning Show Monday (2/10). On 'ZCY, the show replaces Chachi & Jenna. Chachi moves to afternoons, where he replaces Alex Harley; Harley moves to middays, which has been vacant. Jenna, who also handles news for three of the five stations in the cluster, will remain in that role. On 'XTA, AMS replaces Mike Sheffield. No word on his future plans with the station. Country Aircheck reported yesterday that up to 19 stations could add AMS on Monday, with details on several of the transitions (CAT 2/5), though official word isn't expected until tomorrow (2/7).