Lady Gaga Earned $90M last year alone!

Forbes Magazine has named Lady Gaga as the most earning ($$) artist last year.
Gaga apparently earned approximately $90m, which is double that of Taylor Swifts earnings, who came second in the list with $45m. Then the list goes:

Katy Perry - $44m
Beyonce - $35m
Rihanna - $29m
Pink - $22m
and then at number 9) Adele with $18m (beaten by Celine Dion!)