Ooo! Brian McFadden warns Nick Jonas not to mess with his ex

Brian McFadden has a few words of warning for Nick Jonas.

18-year-old Nick Jonas is now dating a 26-year-old Delta Goodrem – who was engaged to Brian for four years.

“It’s fine, you see it and accept it for what it is,” Brian said according to ZackTaylor.

“She looks happy. If she’s happy I don’t mind. She’s on a date with a guy, she’s got a smile on her face. If she’s happy I’m happy. But there’s a warning from me, if he hurts her he’s dead.”