Miley Cyrus hospitalized: Did death of dog trigger tailspin?
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Is the death of her dog behind Miley Cyrus' sudden hospitalization?
Cyrus was admitted to the hospital and unable to perform her "Bangerz" concert in Kansas City, Mo., as planned.
A rep for the singer said the 21-year-old canceled her performance Tuesday after she was hospitalized for a severe allergic reaction to antibiotics.
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Publicist Meghan Prophet said Cyrus was on "medical rest" at her doctors' advice.
But TMZ said it was the death of her beloved pup Floyd that sent the singer into a tailspin.
Indeed a video of a recent Cyrus concert shows the singer breaking down in front of a huge, blow-up likeness of Floyd.
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"She's been off the rails since this happened," a source told the web site, adding she had been drinking a lot and that drugs were also involved.
Cyrus said on Twitter that she's heartbroken to miss the show. She also posted a photo of herself wearing what appears to be a hospital gown.
Tickets for the concert at Sprint Center are being refunded.