According to her manager, the veteran pop star will be returning to her Rock Witchu tour Wednesday night at the Verizon Center in Washington, D.C., after being forced to postpone nine shows while she struggled with a previously undisclosed illness.

"After a thorough medical evaluation, it has been confirmed that Janet's symptoms are being caused by a rare form of migraine called vestibular migraine or migraine-associated vertigo for which she is currently receiving treatment," read a statement released by Jackson's camp and obtained by E! News.

The "Together Again" singer has not performed since falling ill Sept. 29 during a sound check before a show in Montreal.