The record label took to its official Twitter on Monday to float a teaser photo of the two dancing under glaring lights. "When We Disco" is a retro-flavored Euro-disco track, according to the company.
"When the song was in the final stage of preparation, Park's 'student' Sunmi contacted him and talked about their bygone days in the U.S.," JYP said in a statement. "After the talk, Park thought that their memory went well with the track's lyrics, so offered collaboration."
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source: The Korea Times