"Barbie's birthday is actually March 9 ... the symbol of the blue sapphire also takes shape in the doll's design. She wears blue sapphire earrings and sapphire blue eye makeup.

In the Q&A below, Schiffer (who shares son Caspar, 17, and daughters Clementine, 15, and Cosima, 10, with husband Matthew Vaughn) reveals more details about her 50th birthday Barbie collaboration ...

"The best birthday present ever ... of Estefan's chart-topping 1989 "Get on Your Feet." The design of the outfit worn by the Barbie was inspired by the look the vocalist wore in the song's ...