WATCH: K-Pop Group TWICE Debuts Catchy Single 'Knock Knock'

K-Pop group TWICE dropped a new single Sunday — and it’s a definite earworm.

The Korean act debuted “Knock Knock,” one of two new songs featured on their EP Twicecoaster: Lane 2.

The video features a cameo by the group’s creator, Park Jin-young.

TWICE came together in 2015 via reality show Sixteen and released “Like Ooh-Ahh.” The nine-member group has since become one of the most popular music acts in Korea, with each EP landing on charts around the world.

Their single “TT” was one of the biggest songs in Korea last year and its video has been viewed nearly 140 million times.

On Sunday, TWICE wrapped up a three-night run at Seoul’s SK Olympic Handball Gymnasium. They’ll play shows in Bangkok and Singapore in April.

Check out the brand new track “Knock Knock” below: