John Legend Sings About 4-Hour Long Erections on 'Carpool Karaoke'

As James Corden puts it, John Legend could sing about anything and make it sound beautiful — and he did just that during the late-night host's famous Carpool Karaoke.

Corden challenged John Legend and Alicia Keys to an improvised sing-along using goofy phrases like "natural deodorant" and "an erection lasting more than four hours."

"You two, you have such incredible voices, there's literally nothing you can't sing and it won't sound good," Corden said from the back seat.

Keys, who admitted to using natural deodorant, busted out an impressive tune about her husband, Swizz Beat's, less-than-enthusiastic response after borrowing the non-toxic stuff.

And let's just say after hearing Legend's tongue-in-cheek jingle about an "erection lasting four hours", we know now that with wife Chrissy Teigen, he's cemented himself as one of the most entertaining stars in the biz.

Legend and Teigen have proven their hilarity time and time again. Earlier this summer, Teigen joined her husband on stage during a concert and suffered a wardrobe malfunction that would have left anyone else red-faced and embarrassed — but not those two.

Teigen and Legend were bumping and grinding onstage while Legend sang his hit "Slow Dance" when Teigen's black floor-length dress moved, revealing one of her breasts. The couple laughed it off and didn't miss a beat.

It's clear that no matter the awkward situation, Legend's soulful voice will always be the star of the show.