Well.. u can always try :D. (As long as u won't pursue a carreer in the same industry)
I almost once wrote a letter to a dutch musician, her name is Anouk (
Picture link), she's quite famous her in my country.. maybe u know her.
Every time when I was at my crappy job... I heard her songs.. and I thought her songs were crap.
Her songs all sound the same with an acoustic guitar or (raw) electric guitar.. bleh.. and her new songs as well.
So.. I almost wrote her letter with some criticism.
But.. I first did some research (fortunately!). She got married has 2 kids. She 30-40-ish. But then! She got divorced! And she's fired her entire band. And sleeps around with a teenage Maroccan rapper.. (gangster wannabe stereotype)
Anyways that was about a year ago.. (the bitch is crazy!)
Not that she would really read my letter though.. I think.. If I would write it.
But u can always try semtex :D