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"how do we look? we doin' okay?!"🎬💦 let's go watch BT21's SAD BUT FUNNY behind the scenes to be UNIVERSTAR on <BT21's YouTube Challenge:Behind the Scenes> now!!🍿 👉🏻 lin.ee/7pRZBwj/hntj #BT21 #UNIVERSTAR #OriginalStory #YouTuber #Behindthescenes #still #struggling