Jennifer Lopez’s famous backside is flying south for winter and her wispy hubby wants it back–STAT!

The 39-year-old singer-and-actress — now a mother of two — showed off a new slimmed-down figure during an interview on Good Morning America this week, but some fans noticed that the star’s once voluptuous rear was only a shadow of its former self.

Jennifer’s husband, salsa star Marc Anthony, reportedly agrees. Marc is said to be distraught with his wife’s changing physique.

“Jennifer’s really into triathlons and has stepped up training. She’s super-fit but it’s eaten all her curves, especially her behind, Marc is really upset.”