BT21 vs TinyTan: BRIEF ANALYSIS OF BTS LINE FRIENDS AND BTS CHARACTERS – Seoulbox
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BTS' New BT21 Collab With Line Friends Blends Fashion, Emojis & K-Pop | Billboard – Billboard
BTS used their cute BT21 characters to invade Facebook Messenger with covert K-pop branding – are animated stickers the future of music? | South China Morning Post
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