Superstar Mariah only just kicked off her residency at Caesars Palace last week on 6 May, but she was forced to cancel a show under the advice of her doctor.
In a message to fans, Mariah said: "Hey guys.. I've been fighting bronchitis for the past few days.. almost better but on mandatory vocal rest per doctor's orders. I'm so sorry to cancel tonight's show but I promise to make it up to you!!! Love you always, MC."
No further details have been revealed and it is not yet known how long Mariah will be on vocal rest for.
Mariah's residency, 'Mariah #1 to Infinity', features 18 scheduled performances, including her new single 'Infinity'.
She kicked off her debut week by watching friend, model and actor Tyson Beckford, at a Chippendales show, where she was brought on stage and serenaded by the stripping troupe.
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