"I just counsel from afar," he explained. "I just help with ideas and whatever she needs from me.
"Of course I pick it apart, just like she picks my stuff apart, and that's what we do for each other, because it's our professions," Smart added. "I really excel in that kind of dance world and creative direction. And she excels obviously in acting, and has been in the business. So she helps me, I help her."
Meanwhile, last week J.Lo talked to ET at the TCA Winter Press Tour about the "intense" rehearsals for her show.
"It's just never-ending," the 46-year-old diva admitted. "And it's like, 'Are we going to be ready for Wednesday?' I don't know. It feels like we're close but we're also not close. But we'll be ready."
"I just want them to have a good time," she said of the audience. "I think when anybody goes to see an artist perform in concert in Vegas, they want a great show and that's what I plan to give them. A great show, a great night."