The wife of Michael Buble shows off her incredible figure as she models a series of underwear sets from the label's Christmas range.
The Argentinean beauty, who gave birth to her first child back in August, is seen standing on a roof top with her hands on her hips and the New York skyline in the background.
Another shot shows her perched on a silver bench while she wears a black and red design.
Luisana has been the face (and body) of Ultimo for the past two years but will be replaced by a new celebrity in 2014.
Explaining the reason for her departure, Ultimo founder Michelle Mone said, "Luisana is taking time out with her new baby boy, Noah – we wish her all the very best and I'm sure that she will be back working with us again in future.
"Luisana has been incredible for Ultimo thanks to her international profile," she added. "She's been the perfect role model and a true asset to the brand, as well as a good friend. "
Ultimo is available from www.ultimo.co.uk & Debenhams.