Sorry for linking (upper portion of item with three sigs) and also I need an ID on the singer/autograph authenticity. The posted image is the best I could do and no tutorial could probably help me.
Here is the Brian Wilson and Al Jardine which I did post in the thread, it appeared and then shows up as a small "x"
I'm pretty sure all the autographs are awful but I need to be able to get opinions for my family member.
Im sorry to say none of these look authentic to me. The Beach Boys looks likely done by the same hand.
The David Bowie is also bad, IMHO
The "Bowie" is a definite forgery. Sorry.
Sorry but these are not authentic in my opinion.