Jungkook aka Jeon Jung-kook, the youngest member of the South Korean pop band BTS,?turns 25 today. The band, which also comprises RM, Suga, V, Jin, Jimin, and J-Hope enjoys huge popularity with millions of fans across the world. On Jungkook's special day today, let's have a look at how the ARMY is celebrating his birthday all around the globe.