If you are found to be eligible to take part in this study, you will have 3 MRI with MRS scans on both breast including the affected breast. The scans will be performed before chemotherapy, 21 days (plus or minus 3 days) after you start chemotherapy (Day 1 = your first day of chemotherapy), and at the end of the chemotherapy/before surgery. If you have never had an MRI scan before, you will be given the opportunity to watch a 10-minute video to prepare you for the procedure.