Among the casualties was a date on “Live With Regis,” and appearances at the annual B-96 Boo Bash October 27 in Chicago and a Disney Channel/Time Warner event in New York City’s Times Square the next day.

Her doctor has reported that Aguilera is suffering from “a viral syndrome associated with exudative tonsillitis.”

She’s expected to catch up with her calendar within a week. The singer is scheduled to perform at the Radio Music Awards November 4 in Las Vegas and is set to tape her ABC television special November 7 and 8 in Los Angeles.

Aguilera was troubled by throat problems through much of her just-concluded tour, resulting in the cancellation of several dates.