The Christina Aguilera news that she's coming back for next season of "The Voice" was reportedly not enough of a reason to prevent Blake Shelton and Gwen Stefani's apparent romance.

According to Celeb Dirty Laundry, Shelton and Stefani purportedly flirted with each other during their "The Tonight Show With Jimmy Fallon" appearance along with fellow judges Adam Levine and Pharrell Williams.

In the video, when Williams picked Stefani to sing "Hotline Bling," he also chose Shelton to sing it with her. As the pair took the stage, they kept on staring at each other as the No Doubt singer sang some lines and the country singer muttered "bling." They also shared some silent laugh as they sang. It was not clear though if the pair was indeed flirting as they interacted as well with Fallon and the other judges during the fun segment.

Rumors linking the No Doubt singer and the country singer have been swirling since they both gotten divorced. As claimed by an Us Weekly source earlier this month, the flirting has gotten "real." It was purported that Aguilera's return was arranged to block them from getting closer to avoid drama on set. Both Stefani and Shelton as well as NBC have not addressed the rumors.

But it seemed the news and rumors about the Blake Shelton, Gwen Stefani alleged romance were the last for the worries for the part of some "The Voice" crew. It appeared they were more concerned for Christina Aguilera's purported "diva antics."

According to an item on OK! magazine, since "The Voice" started shooting for season 10, the "Beautiful" singer has apparently been making "dramatic demands." It was not specified what the alleged demands were.

"Christina is a nightmare," an insider told the source above.

Watch Blake Shelton and Gwen Stefani's alleged flirting below despite news that Christina Aguilera's return was seemingly meant to stop their rumored romance.