“KPop Demon Hunters” plays on that with their storyline about an all-girl singing group, who, in addition to being stars in that genre, also hunt demons out to consume human souls in a bid to protect their fans. One of their biggest challenges? A rival boy band that are actually demons in disguise.

As KPop Demon Hunters continues to grow into a full blown cultural phenomena, Netflix is preparing to put a sing-along version of film into theaters this weekend.

Both songs owe most of their still-rising success to steady streaming growth, but are also now bubbling under on the Pop Airplay listing, with early radio support coming from iHeartMedia stations and...