"They only want you when you're seventeen.
When you're 21, you're no fun."
The message of the song is aimed towards the morally bankrupt modeling industry, where youth is prized and the older you get the less you're wanted. I started thinking though about this statement though and found hidden within it a profound gospel truth.
"At the same time came the disciples unto Jesus, saying, Who is the greatest in the kingdom of heaven?
And Jesus called a little child unto him, and set him in the midst of them,And said, Verily I say unto you, Except ye be converted, and become as little children, ye shall not enter into the kingdom of heaven.Whosoever therefore shall humble himself as this little child, the same is greatest in the kingdom of heaven."