As a very young child, Joshua believed in angels. Later however, JC Chasez forgot all about his guardian angel saving his life.
When his life began a downward spiral, Heaven was paying attention and sent his former guardian angel back to earth.
Ciel didn't much like adult humans - and it made her even more displeased to see what the darling little boy had become.
A rescue and an angel with amnesia later, JC's life and Ciel's very existence would be altered forever.
So, it isn't an *NSYNC song -- it's 98 Degrees, but it so works!