Janet Jackson has revealed what the "mystery illness" is that has forced her to cancel a number of dates on her 'Rock Witchu' tour - and it's not that celebrity catch-all of 'exhaustion' that some cynics have suggested. The singer has actually been suffering with migraine-associated vertigo, which is pretty nasty and causes dizziness and imbalance, amongst other symptoms.
In a statement, Jackson's manager Kenneth Crear said that she is now getting better and will return to the tour as soon as possible. Crear said: "She's a world-class entertainer and needs to be at the top of her game to give her fans the show they expect. She's feeling much better and is ready to hit the road again to finish the tour".