Why do people care so much about celebrities?

I seem to see so much on Etalk daily and such, and why should it be our business on the status of Britney Spears spelldown or what is going on with Justin Timberlake? I understand however in some stuff like enjoying the music that one may make or trying to learn from how Peyton Manning plays his game if you are took look to be a quarterback in football, for that quite frankly is smart. But do we need to know what Faith Hill and Tim McGraw's personal life is all about? I mean their music is great, but why do so many people attach themselves to other peoples personals lives?