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entertain.naver.com
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Lee, Ha-na (February 6, 2021). '음악중심' 아이유 '셀러브리티'의 힘, 출연없이 1위‥김우석·CIX 컴백(종합) ['Music Core' IU's "Celebrity" power, 1st place without any appearance, Kim Woo-suk and CIX comeback [Overall]]. Newsen (in Korean). Archived from the original on February 13, 2021. Retrieved February 21, 2021.
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