The fifth season of “Jersey Shore” will premiere Jan. 5 on MTV, the cable network said Wednesday.

The hard-partying cast have returned home to Seaside Heights, N.J., after spending season four in Florence to pay homage to their Italian heritage.

“On their home turf and excited to be in their natural habitat, the cast hits the ground running … dealing with their evolving group dynamic amidst the tensions and hookup rumors left over from their time in Florence,” a statement from MTV said.

The smash hit show, featuring Nicole “Snooki” Polizzi, Mike “The Situation” Sorrentino and their perma-tanned party pals, has been a ratings goldmine for the Viacom-owned network.

The debut of season four in August drew 10.5 million viewers, making it the most-watched MTV season premiere ever.