The American leg of Miley Cyrustour is now officially over, thanks to an extreme allergic reaction to an antibiotic. Her representative released a statement Friday indicating that all remaining U.S. dates on the Miley Cyrus Bangerztour have been postponed. That means that shows scheduled next week for Philadelphia, at Foxwoods casino in Connecticut, and on Long Island, New York are officially off -- at least for now. The announcement is n't entirely unexpected: Her representative said Thursday that the entertainer could need a lot more time to recover from the ailment that landed her in a Kansas City hospital last week. Sick of waking up to needles, the 21-year-old Cyrus tweeted Friday. #goingthruit. The singer canceled a show in Charlotte, North Carolina, last week because of what was reported to be a flu-like illness. But the severity of her condition was n't fully known until this week, when she canceled performances in Kansas City and St. Louis. In a statement, her camp explained that Cyrus got a sinus infection while in North Carolina, then was prescribed the antibiotic Cephalexin, which she has now suffered an extreme allergic reaction to. This type of extreme reaction can last from five to 27 days in these types of cases, the statement said. She will remain hospitalized and is under a doctor's care until we see some improvement in her condition and is asking for