Psy recently released this video for his new song, "Gentleman." the lyrics say they dress like gentlemen but act like naughty boys.
Psy showcased the video in South Korea's World Cup Stadium which is only about 30 miles from North Korea.
He also had a message about the escalating crisis.
Psy said, "Me and 50,000 Korean people, we're gonna sing out loud, we're gonna shout out loud, and we are really close to there. It's a bit north to us right now. So they can hear it I think. They can hear it. They can hear it, our voice."
Psy's Gangnam Style video had 1.5 billion YouTube hits.