Britney Spears began her career in 1990 auditioning for The Mickey Mouse Club at age 8. She gained fame in 1998 with her debut album "...Baby One More Time" and its lead single of the same name reaching #1 on the Billboard charts. By 2000, she had cemented her status as a pop star but faced challenges in her personal life in later years, including rehab stints and losing custody of her children, though her 2009 album Circus helped her regain success. Miley Cyrus also started young, starring on Disney Channel's Hannah Montana and releasing her first album in 2007, but shifted to a more sexualized image after signing with RCA Records in 2013 with the album Bangerz, changing her