I love CHR radio, but let's be real here: According to the new PPM released ratings, KYKY (Y-98) is the third highest cuming station in St. Louis. (Z-107.7 is fourth), and is third highest in shares with a super healthy 6.6. It has the kind of demos, numbers, and shares that advertisers crave!
Therefore, the chance of anyone messing with Y-98's format at the present time are zero.
The station most likely to flip to CHR is Talker KFTK FM 97.1.
Urban KATZ 100.3 The Beat isn't doing too hot, but its owned by Clear Channel, which owns the market's CHR/Pop Z-107.7. KATZ has also applied to change its the location of its tower to better serve the market. Country station KSD 93.7 The Bull, another CC property, also isn't performing as well as it could so it might flip at some point.
Bonneville has a conservative corporate culture so even though Spots on 101.1 isn't performing well I doubt we'll see that station go CHR.