Ghost already won Best Metal Performance at the American Grammys a few weeks ago, but that was relegated to the pre-show and quickly forgotten. In Sweden, not only did the award for Best Hard Rock/Metal Album Of The Year but they also performed.
The entire clip is above, we've started it at the beginning of their performance, but if you scan to the start of the video, you can hear Erik from Watain pay tribute to Quorthon from Bathory before Ghost wins their award. Sweden even does award shows better than we do.