Almost two months after 17th birthday, Britney Spears notched her first Billboard Hot 100 No. 1, as her introductory smash, "...Baby One More Time," reached the pinnacle. She's since upped her total to five Hot 100 No. 1s (most recently in 2011 with "Hold It Against Me"), as well as six No. 1 albums on the Billboard 200.
I had just gotten cable when this bop was big. We had just moved and the previous owners had a month of cable pre-paid for us. It was one of the first music videos I ever watched. Twas a life changing moment for sure.