JULIA TO WEAR "FAT SUIT" IN UPCOMING MOVIE

WHERE'S THE BEEF?

Unlike Renee Zellweger in "Bridget Jones's Diary," Hollywood queen Julia Roberts won't pig out and fatten up for her new flick, "America's Sweethearts" -- which requires her to look porky! Julia refused, saying she'll wear a "fat suit" instead! (What a DIVA! First she refuses to grow breasts for "Erin Brockovich" . . . and now THIS!?)