OPINION: In the music industry, there have long been comparisons to Madonna thrown around – a pop single here, a fashion look there – but to encompass the scope and success, and global fame of Madonna That’s another league entirely. Figures came out this week that Rihanna is now the most watched artist on YouTube, with her official channel RihannaVEVO reaching more than 3.47 billion views, nudging aside Justin Bieber who was considered the king of social media.