The country singer has known the former Hannah Montana star since she was born, and said she thinks the 18-yer-old's raunchy image is an effort to move on from her Disney days.
Appearing on Larry King, she said: 'Hopefully she didn't get that from me because I certainly never encouraged her to do any of that... I think she's just in a cross - she's just kind of in a crosswinds trying to overcome the Hannah Montana little girl, and trying to become a young woman.
'I don't know if she's surrounded by people that are helping her to not make the wise decisions.
'I'm hoping that Miley is going to be just fine. I know she's very gifted and I love her dearly and if she ever needs me I'll do everything I can to help her in any way that I can. So I think we should just let her grow up.'
She added that in her opinion women in the entertainment industry are pressurised into being 'trashy'.
'I think this day and time, life is hard for young people, certainly young girls... The world is just... you just can't flaunt enough,' she explained. 'You can't just do enough. You can't just talk trashy enough or dress trashy enough. It seems to be like if you don't do that you're not in the in-crowd.'