Anyone ever lost anything in the mail?

Well, I don't know if I really lost these things but Im not sure if they went through. So I guess this could be two questions. I sent fan letters to two of my most favorite celebrities, and I also sent pictures I paid for with my letters in a big envelope. I haven't received anything back from either. Others have gotten autographed pictures, so I was thinking maybe they got lost? don't know. I also sent an appreciation letter to the President, not too long ago, but he is always busy so - that doesn't surprise me. I realize celebrities are busy too. But I wish I could get my pictures back. I have sent a second letter to these two celebrities. Still nothing?