A. The options you have are very much dependant on what I would see when I carry out a full consultation. You’re crossbite can probably be corrected by using orthodontics such as Invisalign…the big advantage being the aligners are virtually invisible, very discreet and can easily be removed when you are singing. Once your bite is corrected porcelain veneers or crowns could be placed to to correct the differences in tooth size and rebuild the tooth surfaces you have lost through wear. I use these combined techniques all the time and they do not impact too much on your time. Once again I am really only giving you general advice as I would really need to see you before giving you definitive options.
I hope this helps you.