What makes a sleb? The mega!
We used to have people from many areas of life who were deservedly famous. Now the media foists on those willing to read /watch the minute details of the lives of pop stars and people famous for being famous.
No wonder many children nowadays, when asked what they would like to be when they grow up now answer 'I want to be famous!' instead of naming a profession or activity, scientist, doctor, explorer, train driver, hairdresser. When pressed as to what they want to be famous for they don't know. Appearing on television, wearing the latest clothes and being seen with other celebrities is seen by many as a complete lifestyle, so sad.