Mariah Carey "Makes It Happen" in New Jenny Commercial (Video)

Jenny, set, go! Mariah Carey wants to help get you in shape for the new year. The pop diva whips her hair back and forth while showing off her post-baby body in a new commercial for weight-loss program Jenny, for which she is the new spokeswoman. A remix of her 1991 hit “Make It Happen” plays in the background as success stories flash across the screen. Let Mariah be your motivation.