These guys rose to internet fame (or shame, you be the judge
) three years ago with a couple of covers.
(they were on the news and there were even covers of this cover of the Katy Perry's song)
(original here
https://www.youtube.com/watch?v=AOzkN8dHnjk)
Recently they also covered Du Hast:
https://www.youtube.com/watch?v=a5xSxGhlHfc