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Adam Levine warned ahead of his return to 'The Voice' after his last run was marked by 'cocky and arrogant' behavior© Provided by Meaww

LOS ANGELES, CALIFORNIA: According to sources, Adam Levine has received a stern warning about his behavior ahead of his return to 'The Voice'.

To provide background, the 'Maroon 5' frontman, 45, who left the show in 2019 after 16 consecutive seasons, was the second-longest serving coach behind Blake Shelton, who quit last year.

Notably, he left the show to spend time with his family and to take a break after working for a decade.

Levine will reprise his role as a coach for Season 27 next year, alongside John Legend, Michael Buble, and newcomer Kelsea Ballerini.

News of his return has caused behind-the-scenes tensions, with employees worried he will bring back the same 'entitled' attitude he exhibited before, as per Daily Mail.

Source claims, 'not everyone is happy with Adam Levine' to reprise his role as coach

Adam Levine left 'The Voice' to focus on his family (YouTube/@thevoice)© Provided by Meaww

Speaking to Daily Mail about Levine's return to 'The Voice', a source claimed, "Not everyone is happy with Adam coming back to the show, There have been many changes behind-the-scenes, but there are a lot of people still there from Adam's time before and don't like that he will be returning, because towards the end of his last run, he was cocky, arrogant and seemed entitled."

The source continued saying about the expected changes from Levine, "People get second chances, and maybe Adam will change. But if he remains the abrasive Adam from the past, then they will get rid of him again."

The source added that producers were keen to bring Levine back in hopes of potentially reuniting him with Shelton in the future.

An insider revealed that 'The Voice' would love to get Blake Shelton back someday (Getty Images)© Provided by Meaww

The insider added, "The Voice would love to get Blake Shelton back someday. The dynamic that Adam and Blake had was TV gold, and the show would love to have that back again in the future."

They emphasized, "Having Adam back shows Blake that if he ever wanted to return, they would do it to his liking and pair him with Adam again."

Producers are hoping Levine's return will provide a boost of nostalgia following recent changes to the coaching line-up

The insider concluded, "Adam provides some nostalgia and he knows how it works. It could lead to other opportunities with NBC Universal and would also keep him away from joining rival network shows like American Idol. It is being seen as a safe and defensive move to bring him back."

Internet says they 'want Adam Levine back' to 'The Voice'

After learning that Adam Levine was warned ahead of his comeback to 'The Voice,' many internet users shared their reactions on Facebook.

One said, "I've lost so much respect for this Man and he truly was one of my favorites. Shame."

While a user added, "I want Adam back....... please," another stated, "Can't stand Adam Levine anymore after what he did to his wife. Don't want him back on the voice"

One user declared, "He should stay on The Voice forever so that he doesn't make anymore crap music. Please…you guys can keep him! Give him a raise!"

"Blake was and always will be my favorite! Watched a few episodes when he left, but want him back on. I loved him and Adam together," another said.