It's not that they have large breasts. It's that they have four of them. The Barbi Twins 29-year-old former belly dancers Shane and Sia have built successful careers as sexual icons on their two accident-causing billboards on Sunset Boulevard, three cheesy cheesecake calendars, and two record-breaking Playboy covers (the most recent of which, January 1993, they say paid $1 million). They don't sing or act ''We pretty much suck at acting,'' admits the quieter Sia (pronounced she-a) but still the offers pour in: They're currently considering feature roles in a sequel to Blake Edwards' smash ''10'' (called, naturally, ''20''), a TV talk show, even, Shane claims, parts in a Disney film. They're bizarre, they're bulimic, and they're America's current cartoon sweethearts, complete with appearances in ads during the recent Super Bowl. The Barbis spent a few of their 15 minutes of fame sharing with us their thoughts on love, life, and longevity in L.A.:
What do your mom and dad think of your chosen career?
Shane: They're very supportive. I went to them and I said, ''There's good news, and there's bad news. The good news is that we're very famous and successful. The bad news is don't laugh we're sex symbols.''
What do you think is the secret of your attractiveness?
Shane: We look good in Playboy because of the photographer. We were fat and ugly we weighed 145 pounds. In our calendar, on the other hand, we look
Shane: Like Elvira. Not that that's bad we love Elvira, but for a calendar... but the calendar became good anyway
Sia: ''Became good?'' Forgive her grammar
Shane: Excuse my grammar it got us a lot of attention, and Mr. Hefner wanted us.
Sia: When we shot the first billboard, we weighed 115 pounds (they're 5'9''), but we were so thin from bulimia we can't even remember the day we did it.
Shane: The next day, of course, we binged and blimped up by 20 pounds.
Have you had plastic surgery breast implants, nose jobs, collagen
injections in your lips?
Shane: No. My sister is a B cup and I'm a D, and if we can hide that, it just goes to show you can fake anything.
Sia: I'm deathly scared of being put to sleep. But if I was awake and it wasn't so bad for me....
How would you define your look?
Shane: We constantly change our look. We have this saying that we have the ''freshly f---ed look'' like we just got out of bed.
Sia: The girl next door... moved.
Shane: We're not going out for a milk commercial.
What's the best part of being famous?
Shane: There are copycat twins who impersonate us at the Comedy Store. That's a compliment we're not even dead yet. And we're rich we're set for life.
How has your fame affected your love lives?
Sia: We have a lot of weirdos in the bushes and those are only the celebrities.
Shane: My sister has the longest relationships they're 20 minutes. We both dated the same man once, but only my sleazy sister slept with him.
Shane: He never found out that we both dated him I think he's in a mental hospital now.