Celine Dion’s Diva Demands Out Of Control On ‘The Voice!’

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Celine Dion guest-starred on The Voice as a mentor for the contestants but her diva behavior was out of control.

A source told RadarOnline.com, “Celine acted like she was a superstar the moment she walked on set to tape her episodes.”

The show insider added, “She was not friendly or welcoming … and brought an entire entourage of people with her.”

The Grammy-winner reportedly complained all day long and requested several retakes.