Celine Dion has been forced to cancel all of her March shows at Las Vegas' Caesar's Palace due to a virus that has left her vocal cords inflamed.

"I tried to sing at my sound check last week, and I had no control of my voice whatsoever," Dion said in a statement on her website. "We thought that after a few days rest I would improve, but it wasn't getting any better."

Dion had previously cancelled shows only through March 3. 

The French-Canadian superstar has been ordered to rest her voice for six to eight weeks and will resume performances June 9. 

Dion is in the middle of a three-year engagement at the Sin City casino. The hotel spent $95 million building the Colosseum for her in 2003, complete with a humidifier to protect her voice. After a five-year run there, she went on a world tour and then took some family time after giving birth to twins in 2010. She returned to the Colosseum last year. 

Tickets for Dion's shows go for up to $250. All tickets will be refunded. 

Dion said the doctor assured her she'll be "back to 100 percent" after resting her voice, but she says she's disappointed to be sidelined. 

"Obviously this is the worst thing for a singer ... not being able to do your shows," she said. "I feel worse knowing that I'm disappointing my fans. I'm so sorry ... I hope they forgive me."

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