Happy Birthday, br Britney Spears!.br Britney Jean Spears br turns 42 years old today.br Here are five fun facts br about the singer.br 1. Before signing her br solo record deal, she br was in talks to be in the br girl group, Innosense.br 2. She used to own a br restaurant called Nyla.br 3. Spears made her singing debut at just 5 years old br when she sang at her kindergarten graduation.br 4. She was initially rejected br from 'Mickey Mouse Club' br because she was too young.br 5. Spears was the best-selling br female artist of the 2000s.