When Neumann was 1 year old her parents divorced and she returned with mother Claudia to her native country where she had a half-sister named Geraldine Conti.

The press called her "Lolita", after the book by Vladimir Nabokov, and extended it to other young models that would follow.

[1] In summer of 2004 she was seen with the model Nacho Herrero on a beach in Punta del Este while she was still dating her manager Matías Liberman shortly after she separated from him and made her engagement official with Nacho Herrero, marrying him but the marriage would last little the couple is separated the following year for her romance with footballer Fabián Cubero.

She took part in a photo session with the football players Mariano Pavone, Marcos Angeleri, Leandro Somoza and Fabián Cubero, in 2006.

In May 2017 Fabián Cubero and Nicole Neumann split up and in April 2018 they formalized their divorce after eleven years of marriage.