Miike Snow.
The Swedish trio was formed in Stockholm in 2007. None of them are named Miike or Snow, although one of them is named Pontus.
They frequently wear white face paint or masks in their concerts as a tribute to a geisha named Silvia who had an affair with Pontus (who I suspect is the guy with the painted mustache in the picture) and had his child but then ran away with a Belgian financier to escape her evil okā-san.
Ok I made this up, but it makes sense and is a lot cooler than wearing white face paint for no reason.
Miike Snow - Silvia (Redial Remix) by CEZETA