TV shows: All That (2002-2004), Zoey 101 (2005-2008)
Jamie Lynn is Britney Spears' younger sister, and she looked like Nickelodeon's dream come true in 2005. Zoey 101 was a huge hit for the network, but reports emerged that Jamie Lynn and her co-star Alexa Nicolas were feuding. Alexa was hustled off the set and life went on—until December 2007, when 16-year-old Jamie Lynn revealed she was pregnant. The show aired its final episode in 2008, and Jamie Lynn effectively dropped out of show business to be a mom.