Akdong Musician on Debut Album, Working as Siblings & Overseas Reactions (Video Q&A)

The K-pop brother-sister duo admit there's sometimes "friction" between them, but have charmed domestic and international audiences

Upon releasing their debut album "Play," sibling duo Akdong Musician sent their breezy single "200%" to No. 1 on the K-Pop Hot 100, spending two weeks atop the chart. The K-pop stars (19-year-old brother Lee Chanhyuk and 16-year-old Lee Soohyun) sent two more "Play" tracks to the Top 10 and saw the LP hit No. 20 on Billboard's Heatseekers Albums chart.

While the brother and sister relished in their chart success, their most pleasant surprise was the connection fans were making to their music – foreign fans, in particular.

"We believed that our music would only receieve love in Korea so we didn't have many expecations," Chanhyuk tells Billboard during an exclusive interview in AKMU's recording studio. "But when searching for us on YouTube, many of the replies were in English."

Soohuyn relates to her brother's findings. "Many people overseas did covers of '200%,'" she adds. "It was so interesting hearing foreigners covering our song and I thought, 'Wow foreigners are covering our song!'"

Watch the full interview to find out what they argue about, which artists they'd like to collaborate with and more.