Korean youth are ditching permanent tattoos for instant stickers that create everything from K-pop designs to fake freckles, ...

Bae interviewed 18 Korean creatives including a k-pop choreographer, an interior designer, fashion designers, a model, a chef, a tattoo artist and a k-pop stylist.

In 2012, the song took over the internet, and it helped pave the way for the global success of Korean pop. But Psy, the artist behind it, spent years trying and failing to replicate the phenomenon.