Demi Lovato throws Nick Jonas' love life under the bus on Carpool Karaoke

Nick Jonas and Demi Lovato celebrated their 10 year friendship anniversary on James Corden's Carpool Karaoke where they sang songs and Lovato seamlessly threw all Jonas' relationships under the bus.

Incase you didn't know he, "dated everyone," according to his BFF, "Cyrus, Gomez, Cyrus, Gomez and then I don't know what else happened," Lovato said. She pulled the dig farther with, "I remember my first purity ring."

The car ride consisted of lots of bouncing and ridiculously high, high notes to songs like "Jealous," "Heart Attack," "Stone Cold," and "Cake by the Ocean."

Helping some friends get to work tonight on the @LateLateShow ????

A photo posted by Nick Jonas (@nickjonas) on

More importantly Jonas reveals that DNCE's (Joe Jonas' band) "Cake by the Ocean" is in fact about sex.

"He was writing with people from Sweden," Jonas said, "they were like what's that thing cake by the ocean, and he goes you mean sex by the beach?" Alas, "Cake by the Ocean" was born.

The "Close" singer did look a little lonely in the backseat as Lovato and Corden were in the front seats so they did what any logical new formed band would do, they took it outside for an on the sidewalk show.

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