Miley Cyrus got a teeth job just in time for the Oscars; on the left, we can clearly see her crooked bottom teeth. The shot was taken at the Golden Globes‘ 66th edition on January 11th; on the right, its a picture taken at the Oscars last Sunday, February 22nd, and her bottom teeth are flawless.
Miley had/has iBraces on the linguals of her lowers. They cause a bit of a lisp when speaking or singing. Her upper right central still overlaps a bit. She may have also had some bondings in the past on her upper laterals or some enameloplasty as well as gingival recontouring.