Chan Marshall of Cat Power has had to cancel her month-long spring tour, set to kick off this Saturday and conclude at the South by Southwest festival in Austin, Texas, due to “upspecified health reasons.” The tour was to support Marshall’s highest-charting album, The Greatest. Cat Power is still scheduled to perform at Coachella and Bonnaroo this year. http://www.billboard.com/bbcom/news/article_display.jsp?vnu_content_id=1001958060