sentences:  The format lasted less than one year as programming was changed to Hot Adult Contemporary branded as Star 100.1.On January 1, 2005, the format was changed to Adult Contemporary and branded as Sunny FM adopting the format that was formerly on 97.5 known as Sunny 97.Prior to changing format to Adult Contemporary the station was known as The Heat 97.5 a Top 40 Oriented radio station, the frequency 97.5 FM which moved to Dewey-Humboldt to serve the Phoenix area.