In 1971, he wrote the title track for the Jack Wild album "Everything's Coming Up Roses", which was released as a single backed with "Bring Yourself Back to Me", written by Don Gould and Lynsey De Paul. The single earned positive reviews, with "Billboard" awarding it Special Merit Spotlight status and it reached number 107 on the "Billboard" Bubbling Under Chart. In 1972, Biddu scored music for the UK spy thriller "Embassy". Around this time, he also started working with UK-based Jamaican-born musician Carl Douglas on a 45 (rpm record) single "I Want to Give You My Everything". While this song was intended for the A side, they cut a song for the B side, "Kung Fu Fighting", in only 10 minutes. Later, at the insistence of A&R at Pye Records, "Kung Fu Fighting" was put on the A-side. Soon after release in 1974, "Kung Fu Fighting" became a worldwide hit, ultimately selling eleven million copies worldwide. In 1974, it received a Gold certification. Shortly after, Biddu also produced Carl Douglas' debut album "Kung Fu Fighting and Other Great Love Songs", which produced another major hit, "Dance The Kung Fu". He soon established himself as one of the key figures in Britain's soul and disco scenes during the 1970s, working with a variety of British soul and disco artists, including Tina Charles, The Outriders, and Jimmy James.