MILEY CYRUS had a severe allergic reaction to some medication and yesterday, and was hospitalized in Kansas City. She had to cancel her scheduled gig because of it.


And no, it wasn't any type of illegal "medication."  If you remember, Miley had to cancel a show due to the flu already last week, and apparently she's been battling major throat and sinus issues.


She seems to be doing okay though, last night she Tweeted a picture of herself in her hospital bed with a toy octopus.