Robert Pattinson & Kristen Stewart get more hits on the internet, than anyone else in the entertainment industry, which is a mystery because the Movie, Twilight, that caused their rise to stardom is average at best but there seems to have been a major over-reaction. You can blame the media for that the way they decide to promote some entertainers and not others.
If we take the case of singer Susan Boyle, she sings one song in the talent show Britains Got Talent, and the media went crazy promoting her which caused a major over-reaction.
Elaine Paige, got it right when she recently referred to Boyle, as a simple singer. There are plenty of good Actors, and Singers, but in these modern times the media, by constant promotion can cause major over-reaction in the General Public.