Number ones:
Christina aguilera
Genie in a bottle /6 countries
What a girl wants /2 countries
I turn to you /-
Come on over baby /3 countries
Dirrty /2 countries
Beautiful /5 countries
Fighter /-
Can't hold us down /-
The voice within' /-
Ain't no other man /1 country
Hurt /1 country
Candyman /-
Carwash /-
Keeps gettin better /-
Britney spears
Baby one more time /16 countries
Sometimes /3 countries
You drive me crazy /2 countries
Born to make you happy /2 countries
Oops!...I did it again /11 countries
Lucky /4 countries
Stronger /1 country
Don't let me be the... /-
I'm slave for you /1 country
Overprotected /2 countries
I'm not a girl not... /-
I love rock and roll /-
Boys /1 country
Me against the music /5 countries
Toxic /5 countries
Everytime /3 countries
My prerogative /4 countries
Do somethin' /-
Someday /-
Gimme more /1 country
Piece of me /3 countries
Break the ice /-
Womanizer /9 countries
Christina aguilera /20 number ones
Britney spears /73 number ones
We know who has worldwide hits
lol