Yes, she should have a star on the Walk of Fame because she is responsible for some of the most iconic clothes in pop culture. The Walk of Fame should represent everyone who has had a large part in making Hollywood successful. It should not be reserved only to actors.
I do believe that Deborah Nadoolman should have her recognition and many awards for her costume designs. I do not believe that a star on the Walk of Fame is warranted. I think that the Walk of Fame should be reserved for the actual screen artists and that costume designers and other artists who work behind the scene should have their own special awards.
Just because she designed these things does not mean she is famous. Nobody would know who she is unless there was a description. A star on the walk of fame should be reserved for those who are actually famous. Being a designer of famous objects for famous people does not count as being famous herself.
The Hollywood Walk of Fame is for people who are famous. As amazing as Nadoolman might be, it is her work that is knows. Nadoolman, herself, is not. She can take pride in her work, but the Walk of Fame is for people to stroll past and recognize names. She is not famous, she is merely accomplished.