VIDEO : James Corden Raps and Teases About His Carpool Karaoke' Primetime Special

CBS 'The Late Late Show Carpool Karaoke Primetime Special' airs Tuesday on CBS. Late Late Show host James Corden previewed his "Carpool Karaoke" primetime special with a musical number and a Jennifer Lopez appearance. "I went to my network boss and said screw it. raps Corden in a new promo video to the sounds of Macklemore & Lewis' "Downtown." He raps, "Viewers will watch it.