Do japanese idols come and go really fast?

Question:

I am scottish and i really wanna become a japanese idol ^_^
I was reading something and it says that idols only usually last until they are 20 (im 14) and sometimes not even as long as that :O I was wondering if you actully do have a talent (not just dancing in your bedroom or having the kawaii look) will you still be kind of famous?
Also do the japanese like scottish/british people better than americans? i read that somewhere too...
Or is it just the same as some people dont like people who are black, white, chinese blah...and it really just depends on the person.

Answer:

Just like anywhere, they come and go. And a few last forever. Like Shonen Knife, an all girl trio. They've been around for over 20 years.
But the chances of a Scot being a Japanese idol, are slim to none. Sorry. You would have to be well
known in your own country first.
Japanese are like most everyone else, each person will have special groups they may or may not like.