Recovering from breast cancer surgery, Sheryl Crow has postponed the remainder of her North American tour with singer-songwriter Jack Ingram. Crow underwent "minimally invasive" surgery on Wednesday (Feb. 22) in Los Angeles, according to her publicist. Although she will receive radiation treatment as a precaution, Crow's physicians say her prognosis is excellent. "I am joining the more than 200,000 women who will be diagnosed with breast cancer this year," Crow said in a statement on her official Web site. "We are a testament to the importance of early detection and new treatments. I encourage all women everywhere to advocate for themselves and for their future. See your doctor, and be proactive about your health." The tour was scheduled to continue through April, and her itinerary also included an April 7 taping of VH1 Classic's Decades Rock Live! with Vince Gill, Ryan Adams and Robert Randolph.