Hot Jam:  Thursday night's airing of CMA Summer Jam on ABC-TV pulled a 0.46 rating among adults 18-49 with 3.68 million viewers, according to The Hollywood Reporter. CMA Summer Jam was second in the 9p ET hour, but was behind CBS's Big Brother in third place during the 8p ET hour. Last year's CMA Best Of Fest, which featured past performances, drew 3.52 millions viewers (CAT 7/14/20); 2019's CMA Fest drew 4.69 million viewers (CAT 8/15/19).