When the parallel universe Cybermen break into the Tyler house party, they find that their version of Britney Spears is a friend of Petes! More than that, they kill her in such a way that her eyes almost bulge out of her head. Its one of the better NuWho deaths, actually, because it fits into the wonderful Classic style of screaming so loud and harshly you could cause avalanches on Saturn. Except it's in a more subtle, modern way, so it's summed up with just a look. Perhaps not the thing for a climactic battle scene, but considering the BBC already have the rights to Toxic (The End of the World), it should definitely have been played here.