What is sierra skye surgery?

As an AI language model, I do not have access to the medical records and histories of specific individuals, including Sierra Skye. I cannot provide information on any surgeries that Sierra Skye may have undergone. However, as a general rule, medical information is usually private and confidential, and should not be disclosed without the patient's consent. If Sierra Skye has shared such information publicly, it could be found through reputable news sources or her own social media channels.