In this week’s episode of Radio Star, four ladies who make their colleagues and audiences' hearts flutter has joined the show. Kim Young Ok, the oldest but the hippest rapping grandma, makes everyone flutter every time she curses like a sailor. Lee Hye Jung, the Big Mama, has made housewives' hearts pound with her cooking and catchphrase talks about her acting career. Jeong Young Ju, the musical actress with the longest career that specializes in scary and intense characters, comes on the show to talk about her intense stories. Lee Mi Do, the mom crush that has been slaying on social media, shows off her stories and skills to make the audiences' hearts race. Boom, the guy next door, joins the show as a special MC.