Miley Cyrus was hospitalized on Tuesday after suffering 'a severe allergic reaction' to medication and forced to cancel a concert in Kansas City, Missouri.

The current condition of the 21-year-old singer was not clear, but she tweeted to fans from the hospital.

A statement from the Sprint Center arena where she was scheduled to perform said that Miley suffered a 'severe allergic reaction' to antibiotics.

'Kansas I promise Im as [heartbroken] as you are. I wanted so badly 2 b there 2night.  Not being with yall makes me feel s**ttier than I already do,' Miley tweeted.

She added that she was in good care a few minutes later.

'Mr. Octopussy & some amazing Drs are taking good care of me,' she tweeted along with a selfie from the hospital.

The singer was placed on medical rest by doctors, according to the statement.

Miley was scheduled to perform at the Sprint Center in Kansas City on Tuesday night, but the show was cancelled due to her hospitalisation.

Refunds were being offered at the point of ticket purchase with online and phone orders being automatically refunded.

The singer has been sick lately and tweeted on Sunday and on Monday about flu-like symptoms.