Explained: 25 years after 'Britney,' 5 new Britney Spears songs showcase a pop icon at a transformative moment

Britney Spears' self-titled third album 'Britney' was released in 2001, just ahead of her 20th birthday.

conservatorship

A legal arrangement giving another person control over an individual's personal and financial decisions.

quadruple platinum

Certification indicating an album has sold four million copies.

The Neptunes

Production duo Pharrell Williams and Chad Hugo, known for R&B and pop hits.

hyperpop

A glitchy, exaggerated pop subgenre referenced in describing the song 'When I Say So.'

falsetto

A high-pitched vocal register used by singers above their normal range.