Okay I slaved over this for hours:
Britney Spears United World Chart peaks
Baby One More Time #1 (7 weeks)
Sometimes #5
(You Drive Me) Crazy #1 (1 week)
Born To Make You Happy #1 (1 week)
Oops! I Did It Again #1 (9 weeks)
Lucky #2
Stronger #3
Don't Let Me Be The Last To Know #10
I'm A Slave 4 U #5
Overprotected #6
I'm Not A Girl Not Yet A Woman #6
Boys #18
Me Against The Music #1 (4 weeks)
Toxic #1 (5 weeks)
Everytime #1 (1 week)
My Prerogative #4
Do Somethin' #13
Gimme More #2
Piece Of Me #6
Break the Ice #20
Womanizer #1 (2 weeks)
Circus #7
If U Seek Amy #18
And

at the pop bars.