But Jenelle isn't the only Teen Mom
star with some recent exciting news. Maci Bookout, 23, announced that she's expecting her second child
-- this time with her longtime boyfriend Taylor McKinney -- on Dec. 29., and fan favorites Tyler Baltierra and Catelynn Lowell welcomed their second daughter
Nova Reign on Jan. 1, after giving their first daughter Carly up for adoption in 2009.