2021 will end with Britney albums reaching these following milestones
— Fan Account 📖🌹 (@britneycharts) May 9, 2021
+900M - In The Zone
+700M - Oops I Did it Again; Baby One More Time; Circus
+500M - Blackout, Femme Fatale
+400M - Glory
+300M - Britney
Britney Jean already surpassed 300M & will not reach 400M anytime soon