Jennifer Lopez Teases James Corden's 'Carpool Karaoke' Primetime Special

James Corden and J. Lo

'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. My boss was like, 'How about a special? You want to do it?' " raps Corden in a new promo video to the sounds of Macklemore & Lewis' "Downtown."

Corden doesn't hold back in the number celebrating his upcoming primetime appearance. He raps, "Viewers will watch it. Critics will judge it" and that the show will be "way over budget." Lopez is later shown riding shotgun as Corden continues, "I'll make your TV shine brighter than a halo. All leading up to a carpool with J.Lo."

"Carpool Karaoke" has become a viral hit, with celebrity appearances including Justin Bieber, Mariah Carey and One Direction bringing more than 800 million views to the Late Late Show's YouTube account. Late Late Show producers are already exploring a spinoff series based on the segment.

The Late Late Show Carpool Karaoke Primetime Special airs Tuesday at 10 p.m. ET on CBS. Watch the promo video below.