LL Cool J Ditches Janet Jackson

Rapper says "scheduling conflicts" will force him to bow out as opening act in singer's tour

Janet Jackson's Rock Witchu roadshow is going to be rocking without LL Cool J.

In the latest blow to the beleaguered tour, the rap icon has called it quits as the opening act, citing unspecified "scheduling conflicts."

While Ms. Control has only two dates left (tonight in Auburn Hills, Mich., and Saturday in New York), she is expected to extend her road show to make up for the nine concerts she scuttled in September and October due to migraine-associated vertigo.

No word yet on who—if anyone—will fill in on her remaining dates, but apparently brother Michael has plenty of time on his gloved hands.