Which female singer earned the most money in 2006?

In 2006, the highest-earning female singer was Madonna, who topped the charts with her Confessions on a Dance Floor album and embarked on a successful world tour. Her earnings for the year exceeded $80 million, making her one of the wealthiest entertainers in the music industry at that time. Madonna's combination of album sales, touring revenue, and various endorsements contributed significantly to her financial success.