His international breakthrough came in 1974 with "Kung Fu Fighting" performed by Carl Douglas; the song became one of the best-selling singles of all time with eleven million records sold, helped popularise disco music, was the first worldwide disco hit from Britain and Europe, and established Biddu as one of the most prolific dance music producers from outside the United States at the time. He soon began producing his own instrumental albums under the name Biddu Orchestra, which started an orchestral disco trend in Britain and Europe with 1975 hits "Summer of '42" and "Blue Eyed Soul"; his solo albums eventually sold 40 million copies worldwide. He also launched the careers of other British disco stars such as Tina Charles, helping her sell 36 million records within a few years, and Jimmy James; scored soundtracks for several British films such as "The Stud" (1978); and produced a hit song for the French singer Claude François. Biddu also experimented with electronic disco and Hi-NRG music from the mid-1970s, and influenced British new wave bands such as The Buggles, founded by two of his former session musicians Trevor Horn and Geoff Downes.