After having entered several radio contests, she was chosen to sing on a
flexi disc that a brand of car lubricant gave away with the purchase of its products, which was the first song she recorded, "
Bikini Amarillo". She subsequently recorded several albums with
RCA, and participated in the 1961
Benidorm Song Festival with the song "No preguntes por qué". She became known to the Spanish audience in 1963 when she starred in the television musical show '''' on (TVE), and in the film adaptation of it. In 1965, she signed with
Hispavox where she recorded "
Muñeca de cera" and the contemporary versions in Spanish and Portuguese of the James Bond song "
Goldfinger". Also in 1965, she participated in the with the song "Me lo dijo Pérez", placing second. In 1966, she was awarded as the Best
Yé-yé Singer. Several of her songs, like "Romeo y Julieta", "
Las flechas del amor", "", and "La fiesta" became hits in Spain. She also starred in several films such as ''
and Would You Marry Me? (both in 1967), and in '' (1968). In 1970, she participated in '''', for the
Eurovision Song Contest 1971. She won the selection, so she in Eurovision with the song "" where she placed second, bested only by 's contestant
Séverine with her song "". She recorded "En un mundo nuevo" also in French, German, English, and Italian. After Eurovision she starred in the same-titled film , which was inspired by her participation at the contest and which shows real footage of it. At the end of the yé-yé years she moved to Mexico where she became moderately successful singing
rancheras. She is still performing today. In 2023, Karina was a celebrity guest in the episode
Snatch Game - España Season 3 of the reality television show
Drag Race España on
ATRESplayer Premium.{{Cite web |date=May 16, 2023 |title=El clásico Snatch Game llega al quinto programa ‘Drag Race España 3’ |url=https://odiomalley.com/drag-race-espana-s03e05-snatch-game/|access-date=2023-05-20 ==Personal life==