Snooki -- Baby Bump -- EXPOSED!

It's been months since she revealed she's carrying a little guido inside her, but Snooki's bulging baby bump at long last made an appearance through her t-shirt in Seaside Heights on Tuesday.

With the "Jersey Shore" back filming for the summer, Snooki's plus one could be ready for his first GTL closeup in the very near future.

The 24-year-old mom-to-be -- officially belly up.