http://www.youtube.com/watch?v=yXdjZ4sBXbU

After a year of problems, Britney has emerged victorious, and is still sober.

Sobriety here doesn't mean that she is no longer an alcoholic or drug abuser. This is not about that. The song, as the amazing Kelly Clarkson has said, is not about that.

It is about living in a better state of mind, it is about fighting your own problems to get to where you are.

Britney has picked her weeds, and kept the flower. Note the two-time reference of "flower" to the most important persons in her life - her children.