A source told the mag: "Ariana needs to be the center of attention, so she can't stand the fact that Ryan is constantly praising Lea and loves any idea she throws out." The source even said Ariana has "gone the catty route" on set, saying "she rolls her eyes anytime Lea talks...[Michele] does all she can to avoid Ariana in meetings. It's only a matter of time until this blows up!"
As if that's not enough, the insider fueled the Ari diva rumors by saying, "Ariana thinks that she's the big star on the show and wants Ryan to cater to her."
Here's the thing – this show hasn't even started filming yet! GossipCop got the true inside scoop (we love you, GossipCop!) from Lea's rep, who said: "They have yet to meet or even start production."