In this economy, it’s good to have a backup plan in case you lose your job. At least this seems to be the career advice young actresses and models are being fed, because they’re adding hyphenates to their job titles faster than Bravo can add cities to its “Real Housewives” franchise. But not all multi-hypenates are created equal (even if a record label thinks it can find the next big thing by posting an ad on Craigslist in search of models who can sing). While some are talented enough to hold down three jobs at a time, others might want to select just one.