Baby One More Time
Britney couldn’t have had a better start on the music scene with her debut single '…Baby One More Time' selling 500,000 copies on it’s first day and peaking at number one on the Billboard Hot 100, a feat completed all whilst she was still a teen.
The single eventually sold 10 million copies becoming one of the biggest selling singles of all time.
It was the song that help pioneer millennial pop.