After several postponed dates on Janet Jackson’s ‘Rock Witchu’ tour Hip Hop veteran LL Cool J has scrapped plans to perform on any of Jackson’s re-scheduled dates. Revealed through the “Baby” star’s publicity firm late Monday, LL Cool J has permanently dropped out as the headliner for Jackson due to unnamed scheduling conflicts. LL Cool J’s cancellation becomes yet another problem on Janet Jackson’s tour, her first North American outing in seven years. As previously reported the “Feedback” star was forced to cancel a string of dates because of a bout of migrane-associated vertigo. She recently resumed the tour while being treated for the illness, which is characterized by dizziness, imbalance and other symptoms. Jackson will continue the tour as planned with a stop in Auburn Hills, Michigan Tuesday and New York Saturday.