BTS & Sia are back in the Music Meet Up. It's their fifth night with their new single 'ON' and if it wins again, it's getting retired. Tonight they're facing new comer rap artist Jack Harlow. The 21 year old, Louisville, KY native has been making a name for himself and between his flow, lyrics and style, he's sure to be someone we'll be hearing about for a while. His break out track 'Whats Poppin' is looking to do damage in the Music Meet Up tonight. Your vote makes it happen!