Mariah flicked her hair around as she poses in the metallic mini dress, her legs looking particularly toned.
Her height is boosted by a pair of silver platform shoes and her tresses are coiffed in a voluminous wave.
A more casually dressed Mariah is also seen in between takes chatting to a circle of women about their weight loss.
During the conversation Mariah also asks her gal pals what their favourite food is to snack on.
Mariah has lost more than 30 pounds since the April birth of her twins Monroe and Morocco, and it certainly shows.
Her new commercial is yet another campaign in which the Butterfly singer has been confident enough to show off her newly slender self.
At the end of last year she flaunted her stomach in another advert for the weight loss system.
People say why Jenny? because Jenny gets results,’ she explains to the ladies.
The superstar singer also carefully listens to the other women as they complain about other programs not working for them.
I tried so many weight loss programs before Jenny and they didn’t work!’ one woman tells her.