Her name is Laura Cogoni, she is an Italian artist. She was on BBLB as his "friend":
This was on Digital Spy:
"kind of sad but i have heat magazine here and there's a small article about his girlfriend. "Laura cogoni, 24, an artist and stylist, was dating Siavash for just a month before he went in to the house, but says she's so proud of him. "As Siavash's gf, I am proud of the way he has depicted himself. He is honest and noble and not frightened of making an entrance. One day, he'll be a fashion icon!"
Has anyone seen the Heat article or any other news about her???
A site about her:
http://lauracogoniatgallery118.blogspot.com/
Maybe I missed this on the forums, but wanted to share!!
So the theory that he has no girlfriend or that it is Noirin, could be made up. Maybe.