Nelly Furtado

Four years after she performed at a private concert for Libya's Gaddafi family, singer Nelly Furtado has announced that she will donate the $1m (£615,500) fee to charity. Furtado's decision has intensified the spotlight on other pop stars, including Mariah Carey, Beyoncé and Usher, who performed at parties for the sons of Muammar Gaddafi.