Wiktionary
glitziest
a. (en-superlative of: glitzy)
Usage examples of "glitziest".
She ran one of the glitziest bordellos in Storyville and was the most irresponsible, shallow harlot in the city.
Elvis is depicted in one of his glitziest white-silk-and-sequins Vegas stage ouffits while sitting on the toilet where he died.