Sheryl Crow underwent surgery for breast cancer on Wednesday, she confirmed via her web site. According to the site, Crow’s doctors call her prognosis “excellent”; she will receive radiation therapy treatment as a precaution.

In a statement released to PEOPLE today, Crow’s former fiancé, Lance Armstrong, said, “I was devastated to hear this news. Once again I’m reminded of just how pervasive this illness is as it has now touched someone I love deeply.”