Yes. A long Time ago, both album sales and touring. People in general, except for her fanbase, don't care for her. She'll always be Britney Spears tho.
What kinda basic question... Britney peaked in ITZ tho material wise that was Blackout and nothing anyone says will change my mind bro. Now she's just maintains a career that has ups and downs until she finds ha man gets married and pops out that daughter she wants more than she wants a frap.