LL Cool J Quits Janet Jackson's "Rock Witchu" Tour

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