Jennifer Lopez will return to Will & Grace for the show's Sept. 16 season premiere, NBC confirms. Continuing the story line from last season's finale, J.Lo returns from her concert tour with her newest backup dancer, Jack. Jenny's comeback sets the stage for Janet Jackson's arrival the following week. "He loses his job with Jennifer Lopez," exec producer Alex Herschlag tells TV Guide Online, "but she feels bad for him so she gets him a job dancing backup for Janet Jackson." Who the heck is running Jacques' Cafe during all this!?!?!