Katy Perry, Lorde, & Ellie Goulding Took Their Threesome To The Dance Floor! Watch Them Shake It HERE!
The new bestiez were more in step with one another by the time they busted a move to Katy's Dark Horse! What, like Ellie WASN'T going to spin it? It's the hottest song in the world!
See some spectacular snippets of the dance party for yourself …AFTER THE JUMP!!!