Photos from left: Diana Walker / Time Life Pictures / Getty Images; Corbis; Frank Trapper / Sygma / CorbisFirst LadyNancy Reagan Turns 90: Photos of Her Most Fashionable LooksFrom glamorous gowns to bow-tied blouses, see the impeccable style of Nancy Reagan, who turns 90 Wednesday.07.19.11 3:15 AM ETPhotos from left: Diana Walker / Time Life Pictures / Getty Images; Corbis; Frank Trapper / Sygma / Corbis