Miley Cyrus tweets from the hospital, says she's miserable

Miley Cyrus performs during "Miley Cyrus: MTV Unplugged" at Sunset Gower Studios on Jan. 28, 2014, in Hollywood, Calif.

Getty Images for MTV

Miley Cyrus sure doesn't like being cooped up at the hospital.

The 21-year-old singer, who was hospitalized Tuesday for a severe allergic reaction to antibiotics, has been tweeting from her hospital bed, saying she's "mizzzzzeraaabbblleeee," adding, "Hospital TV is wacccckkkkkkk!!!!!#wherestheappletv"

And on Wednesday she learned that she'll have to remain there, forcing her to cancel a second show: "the hospital is sayin i wont b released today therefore Im not going 2 make it 2 St Louis. Im so sorry but somethings are outta my control."

Publicist Meghan Prophet said Cyrus is on "medical rest" on doctors' orders.

The "Wrecking Ball" singer was forced to cancel a concert in Kansas City, Mo., on Tuesday. Tickets for the concert at Sprint Center are being refunded.

Cryus tweeted: "I wanted so badly 2 b there 2night. Not being with yall makes me feel sh****** than I already do."

She also posted a photo from the hospital, writing: "Mr. Octopussy & some amazing Drs are taking good care of me":

Miley Cyrus tweets from hospital on April 15, 2014.
Miley Cyrus/Twitter