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It's not a secret that BTS' Jungkook is one of the idols who has changed the most since debut. Exactly 5 years ago today, BTS members held a fan signing event for their fans. Back then, Jungkook was only 16 years old (internationally) and he looked indeed so young. Now that we looked back to the photos, we can definitely feel how much the idol has grown up over the span of 5 years. Check out all of the HD photos below!
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