Let's make this birthday one to remember.

61 years old (Born on April 02, 1963)

Happy Birthday to the fabulous Sia Barbi—one half of the iconic duo who proved that two really is better than one! From gracing Playboy's pages in September 1991 and January 1993, to dominating calendars worldwide four times over, you've always known how to turn heads (and double takes!).

Beyond your modeling success alongside Shane, you've shown us all what it means to be timelessly glamorous. May this birthday bring you twice as much laughter and joy—and may every mirror remind you just how legendary your journey has been. Here's hoping today brings plenty of cake...because calories don't count when you're a twin superstar!