<P> Jersey Shore is an American reality television series which ran on MTV from December 3, 2009 to December 20, 2012 in the United States . The series follows the lives of eight housemates--Jenni "JWoww" Farley, Michael "The Situation" Sorrentino, Nicole "Snooki" Polizzi, Paul "Pauly D" DelVecchio, Ronnie Ortiz - Magro, Sammi "Sweetheart" Giancola, Vinny Guadagnino, Deena Nicole Cortese (season 3 - 6), and formerly Angelina Pivarnick (season 1 - 2)--spending their summer on the Jersey Shore . Season 2 follows the cast escaping the cold northeast to Miami . Season 3 saw the cast going back to the Jersey Shore for the Summer with Deena Nicole Cortese replacing Angelina . </P> <P> The first season had five special episodes, with some airing after select episodes . Several after hours specials have aired on MTV following select episodes along with various specials . The end of each season has been accompanied by a reunion show . Also a number of after - show internet specials titled "Jersey Shore: Hook - Up" hosted by Kenny Santucci have been released on MTV.com after select episodes . Also, there have been a number of internet specials exclusively on MTV.com . </P> <Table> <Tr> <Th_colspan="2"> Season </Th> <Th> Episodes </Th> <Th_colspan="2"> Originally aired </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 9 </Td> <Td> December 3, 2009 (2009 - 12 - 03) </Td> <Td> January 21, 2010 (2010 - 01 - 21) </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 13 </Td> <Td> July 29, 2010 (2010 - 07 - 29) </Td> <Td> October 21, 2010 (2010 - 10 - 21) </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 13 </Td> <Td> January 6, 2011 (2011 - 01 - 06) </Td> <Td> March 24, 2011 (2011 - 03 - 24) </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 12 </Td> <Td> August 4, 2011 (2011 - 08 - 04) </Td> <Td> October 20, 2011 (2011 - 10 - 20) </Td> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> 11 </Td> <Td> January 5, 2012 (2012 - 01 - 05) </Td> <Td> March 15, 2012 (2012 - 03 - 15) </Td> </Tr> <Tr> <Td> </Td> <Td> 6 </Td> <Td> 13 </Td> <Td> October 4, 2012 (2012 - 10 - 04) </Td> <Td> December 20, 2012 (2012 - 12 - 20) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Season </Th> <Th> Episodes </Th> <Th_colspan="2"> Originally aired </Th> </Tr>

What was the last season of jersey shore