I listened to the 99.9 from the Kankakee area at night when they aired Dance Music, and back in the 80s and 90s when it was CHR WBUS The Bus.. All through Chicago, and this was in Winter, the Kankakee station was getting beat up by that country station from Benton Harbour, and ive heard that just east of gary you completely loose the Kankakee station and the Benton Harbour Country station is just booming in.. Both stations are short spaced and on 50kw torches, and there were patches around Chicago, even out to Aurora out west, and in Northwest Indiana where the Country station would take over.. The travel over Lake Michigan makes the Benton Harbour country station very easy to get into Chicago, and the Kankakee station pretty much fades out north of Dowtown if driving toward wisconsin and gets over powered by the benton Harbour station, so im guessing this is most likely what you heard.. DX around water is very common this time of year and wont go away till about mid January.. I would bet money that what you heard was the Benton Harbour country station on 99.9 since O hare is somewhat North and West of Dowtowm,, I bet if you got up and walked around you would have picked up a mix of both stations, but also the Kankakee 99.9 often suffers minor problems that knocks them off air for hours at a time, so that may have also been the case.. When The Kankakee station is off air the Benton harbour station booms in almost local in Chicagoland.