sentences:  On December 14, 2010, just four days after it was announced that Clear Channel/Muskegon would replace WSHZ's Adult Contemporary format with WMUS and its Country format, WEFG-FM dropped its Sports format as "The Champ" to pick up WSHZ's former one as "Sunny FM" WWSN.This marked the second time since 1996 that another station had used the "Sunny" moniker other than WSNX, whose call letters once matched that handle.Sister station WVIB was known as Sunny FM for a time until 2004.