Thanks to singer "IU" (아이유) and her bringing the hottest American English slang of 2004 to Korea, you'll have a hell of a time with your Halloween lesson. K-pop has already made it difficult to get away with saying "One more time," "tell me," and "nobody," although my students seem to have forgotten that any of those songs ever existed. Here's "Boo":
For this particular video the 15-year-old decided to not wear pants, and instead opted for . . . I dunno, is that supposed to be a tutu?
* Update: dave points out that "Boo" samples Debbie Gibson's "Only in my dreams."