Miss Universe 2010 National Costume Show

From 1959 to 1964, there were slight format changes. In 1959 through 1963, there was no cut to 5 finalists; the runners-up and winners were called from the assembled 15 semi-finalists. In 1964, the top 15 became a top 10, and after a round of interview, the winner and runners-up were called from the 10 finalists.
In 1965, the pageant returned to the original format of a cut to 5 finalists, and remained so until 1989.
In 1969, a final question was posed to the last five contestants. The final question was an on-and-off feature of the pageant. In 1990, it had taken root and every pageant since, the final contestants have to answer a final question.
In 1990, the pageant implemented major format changes in the competition itself. Instead of five finalists, the field was reduced from 10 semi-finalists to 6. Each contestant then randomly selected a judge and answered the question posed by the judge. After that, the field was narrowed down further to a final 3. In 1998, the number of finalists was reduced to 5, although there still was a cut to a final 3. This continued to 2001, where the final 5 format was re-instated.