In this trial, the investigators propose to evaluate the role of VEGFR blockade with the tyrosine kinase inhibitor pazopanib in combination with nonsteroidal aromatase inhibitors (NSAI) in patients who are progressing or have relapsed on the same NSAI hormone therapy given for advanced or early stage breast cancer. If this trial demonstrates clinical benefit, this all oral combination could be tested in both the neoadjuvant and metastatic settings in a randomized phase II design.