pixelcats, 
So it took me all day to realise the OBVIOUS #Pop submission for #KPopMonday and #PopMonday! So many #ThenAndNow nostalgic options!
But duh .. clearly it should be Troye Sivan! Australian artist, Bangtan are fans, just released an amazing track. I mean come. on!
For his 'THEN' - Youth. https://www.youtube.com/watch?v=XYAghEq5Lfw
And for his 'Now' - Rush. https://youtu.be/b53QJYP-lqY
Bonus Track - Namjoon and Jungkook covering Fools.
https://youtu.be/LwVbCIA1hgc