Clearly, without knowing anything else, you know this song owes a huge debt to the will.i.am song "I Got It From My Mama". What may surprise you, however, is that it was not only openly authorized, but will.i.am is a co-writer and co-producer of this 2015 single by the king of K-Pop.
That's right. will.i.am is on board. So, you should be, too. After all, it's just a fun, goofy song that verges on parody. Not like PSY knows a damn thing about parody.
CL from 2NE1 provides the female vocal for the chorus.
Also, he's still not quite getting the hang of what Gangnam Style actually is......