Thats too short to be done with a letter, but it looks ok for an email, even if it does look a bit "templated".

If you want a reply from a celebrity via e-mail, then you can't just put:

Dear Pierce Brosnan
The film was good
-Name-

They're unlikely to reply to that, as it looks like or has been copied and pasted.
It should be like a letter
Here's how one should be, and just say they're your favorite actor etc even if they're not.
You can also do this via letter!



_______(Your Name)
_______(Your Address)
_______
_______
_______ (Post/zip code)
_______ (Your country)


Dear _______ (name)

You are my favorite _______ (what they do), I especially liked _______ (song name, film etc). Personally I liked _______ (what you liked) because _______ (reason)
I think that you should continue _______ (what they're doing) because you're great. I thought that _______ and _______ (something the person did) because _______ (reason)
I would like to ask you _____________________ (question, this way the person wouldn't think it's a copy and paste letter)
I look forward to hearing from you, and I wish to thank you for your time and kindness,

_______ (Your name (and age maybe))