Lovato and Jonas insist to Corden that they've never dated, but gushed about how they've been friends for 10 years, which is so sweet.
Lovato did date Jonas' brother, Joe, but never moved beyond friendship with Jonas.
‘They hit it off – and now Demi and Nick are hooking up!
Selena Gomez and Taylor Swift may have never become best friends if it weren’t for their famous exes.
Even though they were taking pictures of us and obviously we were there together it was like, 'It would be better if we stand about 25 feet apart.'" "So it ruined her Central Park experience," he continued.