Hale and a member of her crew were on hand at The Pageant in St Louis, Missouri, on Tuesday. It follows Ghost's request for female fans to serve drinks on their world tour.

In a Facebook post, Halestorm say: "Sometimes you have a day off in St Louis on the same day that Ghost is playing in town. And sometimes Ghost not only invites your band out to see their show, but also has your singer and production assistant be Sisters Of Sin for the evening. Thank you, Ghost, that was awesome."