Is it bad to send an idol a private message on Twitter?

[Sultana]

I want to send a letter to a certain idol through his fan mail address so that I can tell him how much I believe in his musical ability and all, because he really seems like he might feel as if he doesn't have many fans or that his few fans don't really appreciate him very much. So I was wanting to write him a long letter about how much he means to me - because he really does mean a lot to me.
But when I searched what his fan mail address was, I found two different possible addresses.
So basically I was wanting to send him a message asking him which was the correct one. But I'm not sure if that's something that shouldn't be done.
Is it considered an invasion of an idol's privacy to to so? Or do people do that really often so he's likely to not even see it?

[♥Rachel♥]

Well you can only send a private message if he's following you.Otherwise you can only tweet him which wouldn't really be private.
And if he's following you there isn't a guarantee that he would answer you.

Fanmail they get thousands of letters a day.And they only read a select few that whoever gives them their fanmail gives them.So he might not even get the letter or read it.Just wanted you to know that.

You can ask him on twitter but i wouldn't get your hopes up expecting him to answer.