His varied style and individuality made Gainsbourg's songs difficult to categorize, although he is often regarded as one of the world's most influential popular musicians.
In 1969, he released the song "Je t'aime... moi non plus", featuring explicit lyrics and simulated sounds of a female orgasm.
The song also appeared on the LP "Jane Birkin/Serge Gainsbourg".
Originally recorded with actress Brigitte Bardot, the recording was released with future girlfriend Birkin when Bardot backed out.
While Gainsbourg declared the composition "the ultimate love song," "Je T'aime" was censored in numerous countries, with the Vatican declaring the song 'offensive'.
Despite the controversy, the song charted in the top ten throughout Europe, with Gainsbourg writing soundtracks for more than 40 films,