If you were watching "Game of Thrones
" on Sunday night and aren't up on your red-headed singers, you might have been confused. Arya Stark (Maisie Williams) has just slaughtered a room full of Freys , and while riding her horse, she hears the dulcet tones of a melody she doesn't recognize. It's singer Ed Sheeran
in the most bizarre cameo in the HBO hit's history.