Watch The Late Late Show Carpool Karaoke Primetime Special 2018

The Late Late Show Carpool Karaoke Primetime Special 2018 is an hour-long musical extravaganza featuring host James Corden and a star-studded lineup of celebrities belting out their favorite tunes while cruising around in a car. The show opens with Corden approaching a parked car to find young actor Iain Armitage sitting behind the wheel. Armitage, who stars on the CBS series Young Sheldon, admits he's a huge fan of Carpool Karaoke and welcomes Corden to join him for a ride.

As the two banter about life in Hollywood, Corden suggests they warm up their vocal cords by singing "Let It Go" from the hit animated movie Frozen. Armitage, who played young Sheldon Cooper in The Big Bang Theory spinoff, proves to be a surprisingly good singer, hitting all the high notes with ease.

The rest of the show is a series of vignettes featuring Corden's famous guests. Justin Timberlake joins Corden for a trip down memory lane, belting out hits from his boy band days in NSYNC and displaying some impressive beatboxing skills.

Jennifer Lopez takes the passenger seat next, and the two launch into a rendition of her classic hit "Jenny from the Block." Lopez is clearly enjoying herself, bouncing around in her seat and even teaching Corden some salsa moves.

Later in the show, Corden picks up country singer Luke Bryan, and the duo don cowboy hats and sunglasses for a spirited rendition of "Country Roads." Bryan gives Corden a quick lesson in yodeling, much to the talk show host's delight.

But perhaps the highlight of the show is when Corden picks up legendary musician Sir Paul McCartney. The two cruise around McCartney's hometown of Liverpool, singing hits from throughout the musician's long and illustrious career. McCartney even takes Corden on a tour of the childhood home where he wrote many of the Beatles' most famous songs.

Throughout it all, Corden is a genial and gracious host, making his guests feel comfortable and encouraging them to let loose and have fun. His easy rapport with everyone from A-list celebrities to young up-and-comers like Armitage is one of the key reasons Carpool Karaoke has become such a hit with audiences.

The Late Late Show Carpool Karaoke Primetime Special 2018 is a joyful celebration of music and celebrity, and the perfect way to escape the stresses of everyday life for an hour. Whether you're a fan of pop, rock, country, or hip-hop, there's something for everyone in this fun and entertaining show. So buckle up and get ready to sing along with some of the biggest stars in show business.