Bastille brought out a very special guest to help perform their new single "Good Grief" on Ellen -- actress Kelly LeBrock of the seminal 1985 film Weird Science.
LeBrock appeared in a red dress similar to that she wore iconically playing Lisa, the Frankenstein-inspired man-made perfect girlfriend. Standing in a smoke-filled doorway, she smoke her memorable first line from the John Hughes film that the band samples to open their song: "So,what would you little maniacs like to do first?"
From there the band performed the smooth dance track, with the audience clearly feeling it. For her part, LeBrock just grooved on in the doorway, coming in again for another sample from the film later in the song.
Watch the performance here: