While you know you want to throw a glamorous party, it can be hard to settle on a theme that brings this out in the best possible way. The first thing you should do is make sure that all of the elements of your party are set up for maximum glamour: pick a great location, make sure that you have enough food and drinks available, and select your guest list carefully. However, the most important element is arguably the theme, and once you've chosen the perfect theme for your glamour party, other choices will easily fall into place.
A particular location can provide an excellent, glamorous theme for your party. A Monaco party, for example, could feature casino, race car and Princess Grace elements. On the other hand, a London party might have tea sandwiches and Beatles music. A Hollywood party can have the Hollywood sign and red carpets everywhere, while a New York party could have a lot of bright lights, Frank Sinatra, and black-and-white photographs. Whichever location you choose, be creative with it--every location has the potential to be glamorous.
Picking a favourite decade is a great way to throw an unforgettable glamour party. There are several decades that work particularly well for this kind of party: the 1920s, which invites guests to dress up as flappers and bootleggers; the 1940s, which allows guests to dress up with white gloves and evening gowns; and the 1950s, which evokes a more Grace Kelly/Cary Grant feeling. The 1960s, 1970s and 1980s tend to be a little too campy and trendy to work well for a glamour party.
You can also choose a theme based on a group of celebrities--the more glamorous, the better. For example, your theme could be The Rat Pack, and inspire you to play a lot of Frank Sinatra. Alternately, you could choose to have a party inspired by Hitchcock Blondes, in which you screen "Rear Window" or "To Catch a Thief." No matter what you choose, remember to make the theme clear on your announcements and encourage people to come in costumes fitting in with the theme.