In another setback on her "Rock Witchu" tour, Janet Jackson has lost her opening act: LL Cool J. The rapper's publicity firm announced yesterday (Oct. 27) that he has dropped out as the headliner for

In another setback on her "Rock Witchu" tour, Janet Jackson has lost her opening act: LL Cool J. The rapper's publicity firm announced yesterday (Oct. 27) that he has dropped out as the headliner for Jackson because of unnamed scheduling conflicts.

It's the latest problem on Jackson's tour, her first North American outing in seven years. The 42-year-old singer was forced to cancel a string of earlier concerts because of a bout of migraine-associated vertigo. She recently resumed while being treated for the illness, which is characterized by dizziness, imbalance and other symptoms.

Jackson's upcoming shows are tonight in Auburn Hills, Mich., and Saturday in New York. She is expected to announce more dates.

LL Cool J released his final album under contract for Def Jam, "Exit 13," in August. The set has sold just 80,000 copies so far in the United States, according to Nielsen SoundScan.

The veteran rapper's only scheduled date is Nov. 21 in East Rutherford, N.J., as part of Hot 97's Check the Rhyme concert.


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