Is Ariana joining Fifth Harmony?

There's no denying that Ariana Grande has the X factor, but now she's taking it to the next level! The Sam & Cat star recently spent the day with The X Factor's Fifth Harmony and had quite a proposal for the ladies. "6th Harmony? These girls are the sweetest. Nice meeting you. Let's have a slumber party," she tweeted. The feeling was definitely mutual! "Any time, babe. So nice meeting you, you're the sweetest!" 5H replied.