Shane Barbi and Sia Barbi, also known as The Barbi Twins (born April 2, 1963 in San Diego, California), are identical twins and pin-up models. Shane and Sia posed together in two top-selling issues of Playboy, and also in several internationally-distributed calendars. Not long after their Playboy  days, they made a foray into voice acting, with several cameo appearances as brunette scientists in the American animated series Eek! The Cat.

Shane and Sia began modelling at the age of seven when they posed for a layout in the Sears mail-order catalog.  Barbi twins career has spanned fashion, softcore, and pin-up modelling.  After the success of their 1993 calendar released by Topps, Shane and Sia published a premium-rate telephone number called the Barbi Hotline . In addition to the calendar, Topps also published two comic books and a promotional trading card depicting the Barbi twins.

As adults, the twins developed bulinmia, which they have since overcome. Their book, Dying To Be Healthy: A Breakthrough Diet, Nutrition and Self Help Guide (1999), tells the story of their struggles with eating disorders. A portion of the book's profits benefit organizations that strive to combat eating disorders. In the 2000s, Shane and Sia lectured and spoke on television, radio, and online about eating disorders and their careers. In early 2001, they appeared on the CBS television program 48 Hours in a piece about eating disorders, entitled "Slim Chance". After the program aired, CBS hosted a moderated online chat session in which the twins responded to questions from the public.

Shane Barbi has been married to actor Ken Wahl since September 17, 1997. She is Wahl's third wife; his children from past marriages include Louie, Raymond, Cody, and Kyra. In an interview on the Howard Stern Show on the E!  Network and as reported in the January 2004 Hustler Magazine article, Shane Barbi claims that she "shares" Wahl with Sia Barbi. The Hustler article went into further detail claiming that the twins have engaged in incestuous lesbian acts performed for Wahl.

In 2003 the twins sued Larry Flynt over explicit photos taken by Wahl earlier in the year and described in the lawsuit as showing "intimate sexual acts between the twin sisters,". The photographs appear to be the ones later published in the January 2004 Hustler article.

Currently as authors and spokeswomen, THE BARBI'S, who will continue touring the country, are already giving lectures at universities, (USC, Cal Stage Long Beach, etc) and high schools nationwide.

Enjoy the Barbi twins in and out of bikini's in our many posters.