CHTZ-FM (97.7 MHz) is a commercial FM radio station in St. Catharines, Ontario, Canada, serving the Niagara Region.

CHTZ shares studios (nicknamed "The White House of Rock") with its sister stations, CKTB and CHRE-FM, in "Oak Hill Mansion", the former home of William Hamilton Merritt, at 12 Yates Street in downtown St. Catharines.

The change also brought in more accountability with the affiliation to the Canadian Association of Broadcasters to ensure proper codes of conduct.

Bell Media will handle Canadian licensing, marketing, and distribution of the service, contribute its content to the venture, and also gain rights to produce iHeartRadio-branded events.

[4] On June 3, 2016, the station's early afternoon host Jesse Modz attracted national press attention when he pranked a scalper who was reselling tickets to The Tragically Hip's Man Machine Poem Tour.