She is a very strange human. Any normal person would just say "I was a chorister here for five years, so nostalgic to be back!" but because of her obsession with proving that she was working from a ridiculously young age, she makes the hilarious exaggeration that she had a 20 hour/week job when she was 9 years old. Everything has to be framed to prove how hard working she has always been and reeks of insecurity.