She represented Spain in the fourth edition of the OTI Festival in 1975, which was held in San Juan, Puerto Rico with the song "Amor de medianoche" (Midnight Love).

[2] While Spanish singer songwriters such as Mari Trini or Joan Manuel Serrat followed French influences, Cecilia introduced a new style in the 1970s.

She brought and combined into her music her American and Middle East experiences and also looked into Spanish folk tradition and literature.

Cecilia was influenced by The Beatles, Paul Simon, Bob Dylan and Joan Baez as she said in several press interviews.

The front cover of her first album Cecilia shows Evangelina wearing a boxing glove, a clear reference to Paul Simon's song "The Boxer".

The only exceptions are "Lost little thing", cover of Lennon and McCartney's "Dear Prudence" and "Amor de Medianoche" by Juan Carlos Calderón and Evangelina Sobredo.

Cecilia 2 was the name that replaced "Me quedaré soltera" ("I will remain single") as the album title due to the feminism behind that statement.

The super-hit "Mi querida España" had some words deleted on the final version to minimize subtle references to the Civil War and the end of the dictatorship.

There have been posthumous compilations and a re-edition of her songs sung by famous artists like Merche Corisco, Miguel Bosé, Ana Belén, Manolo Tena [es], and Julio Iglesias in 1996.