It is no secret that BTS singer Jungkook is a huge fan of Justin Bieber. Fans have seen the K-Pop singer cover Justin's songs in the past. Last year, the ARMY went crazy when Justin took to Twitter to wish Kookie on his birthday. So, when the Canadian singer dropped his new song Yummy, Jungkook was bound to listen to it. The 22-year-old singer took to BTS' official Twitter handle to share his thoughts on Justin's new song released earlier this week.