Simplify the following text for a Grade 8 native English-speaking person.
Original: Marianne Elisabeth Nordqvist ( born on 18 May 1962 in Stockholm ) more popularly known as Nanne GrÃ nvall is a Swedish singer-songwriter .
Simplified: Nanne GrÃ nvall ( born Marianne Elisabeth Nordqvist on May 18 1962 in Stockholm ) is a Swedish singer-songwriter .