Mastrangi was originally a photomodel who also posed for the magazine
Sétimo Céu. In 1971, singer Wanderley Cardoso arranged her to work as a dancer on
Silvio Santos TV show. Mastrangi made her acting debut in 1974 with
As Cangaceiras Eróticas, an erotic comedy by Roberto Mauro. She continued her acting career with films like
Bacalhau (1976). She became a popular figure of
pornochanchadas and during these years, she was considered as one of the most important actresses of the genre along with Helena Ramos and Aldine Müller. She was cast in the later-to-be controversial film
Amor Estranho Amor (1982) where she plays Olga, a
cougar-like prostitute who took an interest in the young protagonist, Hugo, played by then 11 year old
Marcelo Ribeiro and was the first prostitute to make her move on young Hugo. She posed for February 1984 issue of
Playboy Brasil. After the fading of pornochanchada in popularity, she passed to other genres, including all films directed by Guilherme de Almeida Prado such as
Perfume de Gardênia (1992). == Personal life ==