are my VV concert autographs authentic ?

[karaoke]

i have had alot of success , and a very little failures on sending rock concert V.V.
i will not relate the venues i sent to, as i dont want them to be flooded with mail.
i need to know are they authentic ?
i have only posted some of the successes.

def leppard

billy joel

cliff richard

john cougar mellencamp

sting

cheap trick

billy idol

[dobie516]

The Cheap Trick looks like what I got IP. They are really nice guys.