The Rolling Stones were part of a habit in the 1960s of adapting to American vowels, as they were influenced by some much American music.
Fifty years on, many of today's artists sing with American accents.
Matilda Egere Cooper, editor of The Cultural Expose website, told the Today programme: "When people are learning how to sing, I don't know if they're consciously saying 'I want to sing like an American'. Sometimes it comes down to what's easier to sing or how to sound in a particular way."
"With the American accent, we do have a tendency to pronounce our words quite obviously. So when it comes to singing I think people just tend to sing in a way whereby they're clearly understood."
Pat Kane, from pop duo Hue and Cry, said: "Rock and pop is predominantly an American art form. The American dream, and American pop music is something that inspires the globe."
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