You can make the claim that the best feature of James Corden's "The Late Late Show" is his insanely popular Carpool Karaoke series. The well-liked and hilarious series has already boasted A-list names such as Adele, Gwen Stefani, Jennifer Lopez, Julia Roberts and George Clooney. Most recently, Corden packed his car with stars Demi Lovato and Nick Jonas. Check out their full ride in the video below:

The longtime friends joined Corden on Monday night in one of the best entries into the series to date. Lovato and Jonas, who will be touring together this summer, explained the nature of their relationship to Corden (they're just friends, you guys), while Lovato teased her buddy about his past flings with Miley Cyrus and Selena Gomez.

Jonas confirmed that he was involved with the stars while he wore his purity ring and explained his reasoning for why he stopped wearing it.

"I had a real relationship - with an adult - and I fell in love, actually," Jonas said. "I fell in love, and I felt it was time to take the purity ring off."

(Jonas doesn't name the woman in the video, but he did recently reveal that his new album is inspired by his breakup with longtime girlfriend Olivia Culpo, calling their two years together "the most meaningful relationship I've ever been in.")

Back to those Jonas + Lovato rumors, the two 23-year-olds swear they're relationship is strictly plutonic.

"I don't know if you've noticed, but I kind of go for older guys," Lovato teased Jonas. "No offense."

The trio then took to the Los Angeles streets to perform a musical number in Corden's hilarious attempts to form a band with the young stars. Lovato's "Heart Attack," "Stone Cold" and Jonas' "Chains" and "Close" were among the many hits they sung all together.

Jonas even explained the origin of the hit single "Cake By The Ocean" from brother Joe's band DNCE.

We don't know about you, but we'd love to see Corden, Lovato and Jonas all on stage together!

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