This randomized pilot clinical trial studies how well a virtual weight loss program (SparkPeople) works in helping female African American breast cancer survivors maintain a healthy weight. Many patients with breast cancer are overweight or gain weight after diagnosis. SparkPeople is a free web-based weight loss program that features educational and motivational articles and videos, self-monitoring tools, incentives, social support communities (including discussion forums, teams, challenges, and expert blogs), and options for content to be delivered to members' email. It is a comprehensive program that includes advice on diet, physical activity, and behavioral strategies (such as self-monitoring diet and exercise), and emphasizes safe weight loss and receiving medical attention regularly when needed. A web-based program such as SparkPeople may help breast cancer survivors maintain a healthy weight, which may reduce the risk of cancer returning and patient fatigue, and improve patient quality of life.