“Don’t worry about the other dancers, B-Town,” Paul Rudd assures a nervous Beyonce, who doesn't know who she's about to perform with. “All these guys are pros.” “These guys,” she asks, confused. Sporting the obligatory black leotards and high heels, Justin and two others joined Beyonce for a hilariously clumsy rendition of Bey’s most lauded video. “I’m not feeling this,” a disgusted Beyonce says after Justin backs it up and grinds on her. Those watching in their homes were, though.