Stars & Celebrities Autographs & Fakes
As a Sarah Brightman fan, I have seen many autographs of hers. She did sign some things for me, so I know what her signature looks like.
Remember with stars and celebrities, if they sign something their writing can change due to paper quality, pens, where they are signing it, if they are in a hurry and what mood they are in.
If you have seen a variety of their signatures, then more than likely they are genuine. There are though sadly there are sellers out there that will fake signatures. Keep an open mind, and maybe look at a number of the person's autographs / signatures before you commit to buy.
If in doubt regards autographs, always buy from a reputable buyer, or do not buy at all.