Steve's boyband takes influence from multiple different groups - most notably the K-POP idol group known as EXO who originated with 12 members.
When Francine is in the attic talking to Roger, he talks to the lady behind him and calls her Liddane. Liddane Sanders is a production controller on American Dad and on Seth MacFarlane's other show Family Guy.
When Stan escorts 'Frank' into the woods, the same background-Music as in 'Miller's Crossing'(1990) can be heard.Like John Turturro's character in Miller's Crossing,'Frank'is also supposed to get executed.
This episode is the second time we've heard Toshi speak English (Albeit through singing).
In the B12 Music video, the director is Credited as David Faustino who is the actor who played Bud Bundy on Married...With Children