The world's biggest recording companies have been stripped of two billion YouTube hits after the website cracked down on alleged 'fake' and 'dead' views.Universal, home of Rihanna, Nicki Minaj and Justin Bieber, lost a total of one billion views in the video site???s biggest ever crackdown on its viewing figures.Sony was second hardest hit, with the label behind such stars as Alicia Keys, Rita Ora