Luigi Costume

Me and my sister go to a costume party and we want to get Mario and Luigi. We thought it would give everyone a laugh and that is something that nobody else would too. The thing is I do not know how to do or where to get them from (aus) and we are the girls if we want a change. Help please!

http://www.ehow.com/how_2239447_dress-up ...
or
http://www.ehow.com/how_2222574_dress-up ...