Is Jennette McCurdy Jealous of her 'Sam & Cat' Co-Star Ariana Grande?

Jennette McCurdy does not mince words when it comes to telling people what's on her mind, and in a recent online post she attacked a friend for being fake. Although no names were mentioned, fans of the "Sam & Cat" actress were quick to believe that the "friend" in the post was Ariana Grande. Jun 10, 2014