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“ Gentleman ,” which premiered in April . The latter hit No . 1 on the Billboard Streaming Songs chart , where it was the most streamed song in the U . S . across such services as YouTube and Spotify for two weeks straight . Thanks in large part to Psy ’ s success , the global music industry has seen a major surge in K-Pop interest . According to data provided by Google , in the year before “ Gangnam Style ,” music videos from K-Pop artists were viewed more than 2.2 billion times globally . The year after , that number jumped to more than 7 billion , with the major-