I'm sorry to inform, but this is against site rules. The art, although lovely, does not belong to you. It would be in your best interest to take these down.
I am in no way trying to be rude, but I would highly suggest you read
[link] and
[link] They go into deeper detail about how art thievery, is against US law, and if the original artist were to find you were distributing their works, you could go to court.