Video: Janet Jackson, Christina Aguilera, & Fantasia Perform on ‘Idol’ Finale

Janet Jackson reminded us who’s the real idol on the season finale of “American Idol.” Ms. Jackson, sporting a short, slicked-back cut, appeared onstage in a flowing black and red dress to sing her ballad “Nothing.” She then stripped down to an eye-popping bodysuit to perform her 1986 classic “Nasty.”