http://en.wikipedia.org/wiki/Justin_beiber
http://singularityhub.com/2010/03/16/justin-bieber-and-the-rising-importance-of-accelerating-media/
http://en.wikipedia.org/wiki/Ed_Sheeran
http://www.dailymail.co.uk/tvshowbiz/article-2085837/Brit-Awards-2012-nominations-Ed-Sheeran-scoops-nominations.html
These are all links about my research question