jan van der voort 
     zanger/gitarist  ||  ned  ||   meest aktief van 1970 - 1975
ze hebben geknoeid aan mijn lied, ma
16 verschillende versies door diversen
1970 : look what they've done to my song ma : melanie
1970 : look what have they done to my song ma : billy vaughn
1970 : wer hat mein lied so zerstört, ma? : daliah lavi
1970 : ils ont changé ma chanson : dalida
1970 : non è più la mia canzone : dalida
1970 : look what they've done to my song ma : lawrence welk
1970 : what have they done to my song ma : new seekers
1971 : what have they done to my song, ma : arthur fiedler
1971 : what have they done to my song ma : claudine longet
1971 : ils ont changé ma chanson : raymond lefevre
1972 : what have they done to my song, ma : ray charles
1973 : what have they done to my song, ma : andre brasseur
1974 : what have they done to my song, ma : urbie green
1975 : ze hebben geknoeid aan mijn lied, ma : jan van der voort
1981 : look what they done to my song, ma : joe pass
2008 : what have they done to my song ma : nina simone