The Neptunes produced Britney Spears 'Slave 4 U'
This image appears in the gallery:
23 Amazing Facts You Didn't Know About Pharrell Williams
10. The Neptunes produced Britney Spears 'Slave 4 U'
It was the producing duo's first number one single when it topped the charts in 2001- an achievement that would get them noticed in the industry and lead to many more hook-ups.