Simplify the following text for a Grade 12 native English-speaking person.
Original: Rob Zombie ( born Robert Bartleh Cummings on July 10 , 1965 in Haverhill , Massachusetts ) is a American heavy metal singer , director , producer and screenwriter .
Simplified: Rob Zombie ( born Robert Bartleh Cummings ; January 12 , 1965 ) is a musician , film director , screenwriter and film producer .