Korean rapper Psy said Monday that his next song would likely be released in April.

“I’ve already finished the song, but it has been hellish trying to make the music video,” he told reporters at Incheon International Airport.

The rapper achieved worldwide recognition last year for his music video “Gangnam Style,” the first to hit 1 billion views on YouTube. Last month the video surpassed 1.2 billion views.

The singer recently starred in a Super Bowl ad for Wonderful Pistachios, a popular snack brand in the U.S. The commercial was aired during halftime of the 47th Super Bowl that was broadcast by American network CBS.

The singer made an unscheduled visit to Seoul after his connecting flight to Los Angeles en route from Shanghai was delayed.

Psy left for the U.S. Tuesday to attend events before leaving for Brazil to participate in the Carnival held on Feb. 8-9. The rapper will also perform “Gangnam Style” at the Lunar New Year festival on the northern island of Penang, Malaysia, on Feb. 11.

He will then return to Seoul for the inauguration ceremony for South Korean President-elect Park Geun-hye on Feb. 25.