The numbers were published by research company Sysomos, which claims Michael Jackson and health care were the two most discussed topics on YouTube. This was based on measuring the tags on uploaded videos.

Of particular interest for the music industry, the social group embedding and linking to videos were bloggers aged 20-35, accounting for 57.3% of all links.

This comes after Vevo - the premium music video channel from YouTube/Google, Universal and Sony - announced that it was delivering 30m ...