In preview for Tuesday's episode, Corden takes backseat to the two music powerhouses where her praises the duo's undeniable talent.
"You two, you have such incredible voices, there's literally nothing you can't sing and it won't sound good," Corden says.
To prove that theory, Corden asked Legend to sing about a "four-hour erection" while Keys had to tackle the topic of natural deodorant, which she says she actually uses herself.
Of course the Grammy-winning singers belted out stunning freestyles of whatever Corden threw their way, before dropping the host off and continuing on their ride.
You can watch the full episode of "Carpool Karaoke" tonight at 9 p.m. ET on Apple Music.