Snooki -- The Sober Stumble for Two

Just because she's carrying an unborn baby inside her and not downing tequila shots doesn't mean anything has changed for Snooki ... as the pint-sized mother-to-be once again stumbled to the ground in Seaside Heights on Thursday.

Rockin' a pair of maternity platform sandals, the unmarried "Jersey Shore" star lost her footing and took a sober tumble on to the sidewalk yesterday. Luckily, she was uninjured, quickly got up and went on her non-alcoholic merry way.