Jason Derulo's Response To Jordin Sparks' Song Dig? Showing Off His New Castle Digs!

Looks like Jason is Derulo…uh, the ruler of his own castle! [ Photos: Celebs Who Lost Their Loves This Summer! ] We reported earlier how Jordin Sparks turned up the heat on ex Jason Derulo in disses she placed in her new song How Bout Now, and we wondered how Jason would respond. Well, it seems that Jason