[RUMOR] Naya Rivera Vs. Ariana Grande: 'Glee' Star's 'Worst Nightmare' Coming True Now That Singer's Allegedly Dating Ex Big Sean

While Naya Rivera may have moved on from Big Sean to her new hubby Ryan Dorsey, new reports are claiming that she can't wrap her head around the fact that Ariana Grande is cozying up to her old man. 

While Naya looked all smiles while attending the Justin Timberlake concert at the Staples Center in Los Angeles earlier this week with her hubby, Hollywood Life is reporting that she was finding any excuse to bring Sean and Ariana up to guest of the Puma party during the show.

"Naya was trying to keep it together and have fun at the concert but she was really upset because of the news about Sean and Ariana," and insider told the site. "She kept bringing it up."

The source revealed that she is so hurt by the rumors because during the relationship she had always been weary of Grande and Big Sean, thinking that there was something going on between the two of them.

"It's her worst nightmare because she was always sure that Sean was cheating on her with Ariana, they fought about that a lot. Sean would tell her she was crazy and jealous, he swore to he that Ariana was just a friend, he even said she was like a little sister."

However, the rumored romance is making Naya freak out even more because she feels like it proves they were fooling around while her and Sean were together.

"Naya feels like this is proof that she was right all along and Sean was hooking up with Ariana," the source explained. "She doesn't want him back, but it's still a huge wound and she's hurt and she's angry."