Seventeen seems to be the magic number for pop lyricists. Here's a few examples.
  1. I learned the truth at seventeen, that love was meant for beauty queens - At Seventeen, Janis Ian
  2. Well she was just seventeen, you know what I mean - I Saw Her Standing There, The Beatles
  3. Young and sweet, only seventeen - Dancing Queen, ABBA
  4. And she won't give up 'cause she's seventeen - Let's Go, the Cars
  5. All alone on the edge of seventeen - Edge of Seventeen, Stevie Nicks