Benedict Cumberbatch showed off his pipes Wednesday night when he joined Pink Floyd’s David Gilmour onstage at Royal Albert Hall to sing “Comfortably Numb.” Fans went wild hearing Cumberbatch sing the Pink Floyd classic. Video of Benedict Cumberbatch live singing Comfortably Numb with David Gilmour #benedictcumberbatch #DavidGilmour pic.twitter.com/BfUa0OtiFV — salemzorro (@salemzorro) September 28, 2016 So right now Benedict Cumberbatch is singing Comfortably Numb on stage with David Gilmour. — Jojo Moyes (@jojomoyes) September 28, 2016 #BenedictCumberbatch singing Pink Floyd's "Comfortably Numb" is EVERYTHING https://t.co/UsptSnOznK pic.twitter.com/f7kIQdKMJt — *Lauren Gallaway* (@LaurenGallaway) September 28, 2016 Benedict Cumberbatch singing Comfortably Numb with David Gilmour at RAH.