Spotify (06/20):

Blackout – 566,380
In the Zone – 550,361
Circus – 510,006
...Baby One More Time – 424,247
Oops!...I Did It Again – 408,747
Femme Fatale – 253,142
Britney – 169,792
Britney Jean – 113,199
Glory – 94,117

— Britney Daily Streams (@britneyonstream) June 21, 2021