Today we're toasting Katie Couric, who is ringing in her 58th birthday! On top of acting as host on three major television networks in her career, the newlywed (she got hitched early this summer) also took on the role of interviewing InStyle cover girl Sarah Jessica Parker and participated in a Twitter chat with us this year. She revealed how her personal style has changed through the years. "The older I am the lighter my hair! I don't have to do my roots as often!" she says. "Try to stay current but classic." Take a look back at Couric's standout beauty moments in honor of her birthday, starting with this throwback high school snapshot from 1975!