Simplify the following text for a Grade 7 native English-speaking person.
Original: Susan Kay `` Suzi '' Quatro ( born June 3 , 1950 ) is an American singer-songwriter , musician , and actress .
Simplified: Suzi Quatro ( June 3 , 1950 ) is a famous American rock musician , said by some people to be the `` Godmother of Rock '' .