Billie Piper has revealed she was "insanely jealous" of Britney Spears as the Toxic hitmaker reached "megastardom" while her own career "was dying out".
The I Hate Suzie star, 40, was just 13 years old when she entered the spotlight as a child actor before going on to enjoy a music career.
Billie made UK music history in 1998 when she topped the charts with her debut single, Because We Want To, at the age of 15, becoming the youngest female artist ever to hit number 1.
