Balti was first booked for the cover of L'Officiel, shot by Alexi Lubomirski. Her first notable advertisement campaign came for Dolce & Gabbana. Since the spring/summer 2005 fashion shows, she has appeared shows for designers such as Karl Lagerfeld, Gianfranco Ferré, Marc Jacobs, Alexander McQueen, Givenchy, Zac Posen, Hermès, John Galliano, Gucci, Fendi, Prada, Valentino, Missoni, Chanel, Christian Dior, Versace, Oscar de la Renta, Narciso Rodriguez, Ralph Lauren, and Carolina Herrera,Victoria's Secret.
Balti was cast in Abel Ferrara's movie Go Go Tales (2008) as one of the lead erotic dancers. After the movie and her pregnancy, she returned to the catwalk, became the new face of the Cesare Paciotti international campaign, and replaced Angelina Jolie as one of the faces of the fall St. John campaign, with models Hilary Rhoda and Caroline Winberg. She appears in the 2011 Pirelli Calendar photographed by Karl Lagerfeld.
She has appeared on the covers of many fashion magazines, including Vogue, Harper's Bazaar, W, Cosmopolitan, and Marie Claire, as well as men's magazine Playboy. Her campaigns include Roberto Cavalli, Donna Karan, Christian Dior, D&G, Valentino, Armani Jeans, Missoni, Rolex, Guess?, Paco Rabanne, Anna Molinari, Guerlain, Revlon, La Perla,Mango, and Thierry Mugler. Balti was married to an Italian photographer assistant, Christian Lucidi with whom she has a daughter called Matilde who was born in 2007.
The couple broke up in 2009. Since June 2011, Balti has been dating Francesco Mele, a 26-year-old musician from Sardinia. She also appeared in the 2005 Victoria's Secret fashion show and in their catalogs.