After recording a commercial directed by
Walter Salles, she was called by
Jayme Monjardim, She was cast as Hannah after actress
Bia Seidl quit the role.
Associação Paulista de Críticos de Arte (APCA) recognized Oliveira's performance in that show. It was her first comic role as a television actress. After the end of the telenovela, she lived in
New York City in order to improve her English. In 2001, she appeared in the first episode of the soap opera
Porto dos Milagres. The following year she was in the second season of the telenovela
O Clone, in which she was disguised as the villain Alicinha. In 2011, she had a cameo role as lesbian and convicted drug dealer named Araci Laranjeira in
Insensato Coração. Her performance was praised by viewers and critics alike. She had to gain 15 pounds to play the role and was a victim of prejudice from some of the media and the public. In 2012, she played Yolanda in
Salve Jorge. In 2014, she returns to TV in the GNT series,
Animal, in the role of former delegate and mayor Mariana Gomes. In 2015, it signs contract with
Rede Record to integrate the cast of the novel
A Terra Prometida. In 2018, Cristiana returns to the cinema after eleven years since the last film in which she participated,
Nossa Senhora de Caravaggio. She is in the cast of
Eu sou Brasileiro, by Alessandro Barros;
Borderline, == Personal life ==