This is exactly how I felt a few days (or maybe it was weeks..) ago with a person on dA... but that was because I thought she was some one else and was trying to trick me my stalking ex.. The way they sent messages to people (i mean their form of writing) was almost identical, and she became my subscriber almost right after I blocked the person I thought she was... and I could have sworn I had seen her icon somewhere before even though she was a fairly new member.
But then again, I'm still not exactly sure if she's who i think she is... but oh well.
I'm not on my laptop right now, so I don't have the exact links...
Brushes: I believe I found them on dA or hawksmount.com