It means that it was her choice to be a singer and so when she decided to leave things behind to persue her dreams, she thought she knew what she was getting herself into but now, she's not so sure and she doesn't have time for her family. She doesn't know who she really is since she started all this at a really young age. And if she could do it all over again, she's not sure if she would sing. I saw it in a YouTube video clip.