2011-2017: K-Hits WJMK

on march 9, 2011, cbs announced on march 14, beginning @ 1:04 p.m., wjmk switch classic hits format known k-hits , dropping jack fm format , brand. change marked station s return updated version of oldies format dropped in 2005. station management described format high energy, music intensive , locally driven .

the final song on jack fm goodbye scandal, after 1 last liner featuring homer simpson played advertising new radio station coming chicago happens on frequency, before montage of songs between 1966 , 1989 played (similar wcbs-fm did in 2007 when relaunched classic hits format, , using exact same montage launched oldies format of wocl-fm/orlando in 2008). k-hits launched beginnings chicago.

chicago radio personalities ed volkman , joe bohannon colborn (eddie , jobo) anchor station s morning show, along gary spears hosting middays, bo reynolds in afternoon drive, , george mcfly evenings.

volkman , colborn remain morning hosts until december 6, 2012, when released, station citing low ratings main factor. mornings thereafter hosted dave fogel, formerly of wls-fm. rest of station s final airstaff included brian peck in middays , jeffrey t. mason in afternoon drive. weekend airstaff included ken cocker, john calhoun, , dona mullen.

in last year, station played less music 1960s (save major artists such beatles, rolling stones, , creedence clearwater revival) , focused on songs 1980s, moderate amount of 1970s music, , small amount of 1990s music.

jingles done reelworld productions in seattle of 2017. jam creative productions in dallas, texas did station jingles.