Britney Spears is among the most tweeted-about ‘musicians’ of 2011.

(But that’s not the worst, seemingly at the top of the music list of the Twitterati is Rebecca Black and Friday, after the video for the singer’s debut single was viewed more than 160 million times on YouTube.  I wonder what would have topped the list in my day, but IMHO the youth of this decade will look back and hang their heads in shame.)