Rap originated in the 1970s in the Bronx and Queens areas of New York. There is debate around whether Fatback's "King Tim III" or Sugarhill Gang's "Rapper's Delight" was the first mainstream rap song, though "Rapper's Delight" achieved more commercial success. The Mercedes Ladies were the first all-female rap group. While rap and hip hop are often used interchangeably, rap is a subgenre of hip hop. Rap has evolved from a means of spreading social and political messages to more of an entertainment form. Many modern rappers have successful acting careers following their music careers.