Fabric

Sage from http://www.distinctivefabric.com/fabric.php?product=sequin1&expand=1

bought some boning

bought some boning. and lined these panels with 3 layers of interfacing

then I put it on my head for fun :)

still doesnt look very close to the picture (yet)

It's not a commodity

Lady Gaga Explains Her Haus Of Gaga: 'No One Gets It'

'It's not a commodity,' she says of the design team. 'It's not something that's meant to be sold.'

By Jocelyn Vena, with reporting by Sway Calloway

http://www.mtv.com/news/articles/1625758/20091106/lady_gaga.jhtml

Maybe not sold, but imitation is one of the highest forms of flattery ;-)

How did they attach the shoulder???

Ah ha! The first photo I've uncovered that shows a seam in the fabric. So that's how they attached the sleeve!