Fergie has accused Nelly Furtado of wearing a wig. The 32-year-old singer makes the hair-raising claim in her song
Impacto, her latest collaboration with rapper Daddy Yankee. In a reference to Nelly's worldwide hit
Promiscuous, which apparently contained lyrics attacking Fergie, she sings, "I ain't promiscuous, the realest chick up in this. I'm a pull your wig back!" This is not the first time Fergie has mocked the Canadian star in her lyrics. In her hit
Fergalicious she also sings that she isn't "promiscuous".