All about Sam & Cat for your smartphone, your iPhone or any phone.Sam & Cat is a Nickelodeon television series. It is a derivative and crossover Nickelodeon series iCarly and Victorious tv shows. ||| Ariana Grande plays Cat Valentine. Jennette McCurdy plays Sam Puckett. Sam Puckett (Jennette McCurdy) is a teaser teenager who does not like to work. Cat Valentine (Ariana Grande) is a loving girl who always gets in trouble. Jennette McCurdy as Sam Puckett. Ariana Grande as Cat Valentine. The two together create a business of child care.