Irish rock band The Script held a concert In Seoul, Korea on Wednesday and K-pop superstar Psy made a surprise appearance at the show. 

"How was the concert in Korea @thescript!??" Psy asked sarcastically in a Twitter post on Thursday. "I know it was great cause #IwasThere!!! haha."

Psy then linked to a picture of the Irish rockers on stage posing around a cardboard cut-out of a cartoon version him.

The picture shows the The Script striking their best rock star poses with fists in the air and mouths open to the delight of thousands of screaming fans at the UNIQLO AX theater .

The March 27 show in Seoul was the first time the alternative rock group had performed in Korea.

The Script has seen considerable international success since their 2008 debut, touring internationally with Paul McCartney, Take That, and U2.

Their songs have been featured in numerous television shows in the US and UK.

Their concert in Seoul was a high-energy affair with thousands of screaming fans, expats and Koreans alike, showing up for the fun.

Here is a fan video taken from the crowd during the opening of The Script's concert in Seoul: