And to make sure her audience got the message, she spoke out about the people who have attacked her for her sexy image.
"I'm not a little girl anymore," she said. "I'm real happy where I am in my life right now. I'm just trying to find the woman in me."
Old songs, biggest cheers
Britney showcased tracks from her new album, called Britney, a number of which contained lyrics also about growing up.
But it was the old songs that got the biggest cheers, especially the encore of Baby One More Time which the star sang while wearing a see-through raincoat and cowboy hat.