So a US article says Gaga dominates Halloween again?
The easiest Gaga costume to replicate is Fame Gaga - long straight blonde wig, hooded leotard, visor shades and platform shoes. The hairbow hair might be a bit tricky though (unless its in a wig).
Monster Gaga - I'd say a bright yellow wig, purple visor shades and a tinfoil
silver dress..
The Meat Dress, I'm sure you can find loads of replicas now.
I think Jo Calderone will be a big new costume this year.