Pop quiz: Britney Spears

The midriff that changed pop music

2. When “...Baby One More Time” topped the charts in 1999, Britney was:

A. only 17 years old
B. the youngest female artist ever to have a No. 1 single
C. still living at home in Louisiana
D. already pregnant with her first child

(Answer to question #1: D, all of the above)