Cavalli said that he designed multiple loose-fitting and flowing outfits for the 38-year-old singer, who is on tour with husband Marc Anthony.
"It is so complicated because every week she is getting bigger," People quoted him, as saying
"Well Jennifer Lopez, at this moment, she requests something very special because she is waiting for the baby, he said.
"The thing about Jennifer Lopez, she is a singer, she is a dancer. Most of the time when I prepare something for the tour, the performer, they want something very soft so they can dance and so they can move free," he added.