The two former Disney stars, who've been friends for 10 years, and Corden bicker and banter about Jonas' dating history -- Miley Cyrus, Selena Gomez, Miley again -- and that infamous purity ring, before the JoBro cuts the conversation short.
"Are we going to keep talking about my dating life?" he asks while laughing from the back seat.
And just like that, they break into song, belting out everything from Lovato's "Heart Attack," to Jonas' "Chains" and DNCE's "Cake by the Ocean."
These three make such a good trio that they eventually bring their act to the street for a little busking and try to make a few bucks singing Lovato's "Confident."
Watch the whole thing above and just try not to get jealous.