Looks like Nick Jonas better watch himself in this relationship with Delta Goodrem!
Singer Brian McFadden dated Delta and was engaged to her for four years until the couple recently split.
Brian recently opened up about the relationship between 18-year-old Nick and 26-year-old Delta, "It's fine, you see it and accept it for what it is. 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."