Forbes also listed her as the most powerful female in entertainment of 2015.
In 2007, Spears's much-publicized personal issues sent her career into hiatus.
Throughout a career spanning 19 years, she has sold over 100 million records as a solo artist, and a further 60 million with Destiny's Child, making her one of the best-selling music artists of all time.
Time listed her among the 100 most influential people in the world in 2013 and 2014.
An advertising post on Kim Kardashian's Instagram account, for example, is said to cost over a million dollars! I Did It Again 2000 , became international successes, with the former becoming the best-selling album by a teenage solo artist.
Baby One More Time 1999 and Oops!.