He believes that Billy still has feelings for Maria , which she strongly denies .
Michael becomes jealous of Billy ( Maria 's old flame and music partner ) , causing his powers to go out of control , particularly when he sees Billy and Maria singing together .
Michael believes that Billy still has feelings for Maria , which she strongly denies .
Michael becomes jealous of Billy ( Maria 's old flame and music partner ) , causing his powers to go out of control , particularly when he sees Billy and Maria singing together .