At the opening of Valentino's Rodeo Drive boutique, mom-to-be Molly Sims told InStyle: "I'm stuffed in. This isn't maternity [in reference to her black lace Valentino gown], so I somehow miraculously fit. The tighter the clothes are around your belly, the smaller you look, in a weird sort of way." Sims isn't the only celeb who's favored a body-skimming look during pregnancy. Check out these other famous moms who abided by the philosophy that tighter is better. Do you agree that their looks flatter, or do you think that loose-fitting maternity attire is the way to go?