TV Show: Zoey 101 (2005-06)

On Zoey 101, Alexa played Nicole Bristow, best friend of the title character Zoey Brooks, who was played by Jamie Lynn Spears. But off camera, the two were anything but. They feuded, and on at least one occasion Jamie Lynn's big sis Britney Spears showed up to chew Alexa out. Alexa, now 20, quit after the second season, citing an "uncomfortable working environment."