On June 29, 2007, the program's longtime film critic Joel Siegel died of complications from colorectal cancer at age 63. The July 9 edition of "GMA" was dedicated to Siegel, with former hosts Hartman, Hill, Lunden, Newman, Christian, Perkins and Gibson all appearing to share their memories. One month later, on July 31, 2007, Robin Roberts announced that she had been diagnosed with breast cancer after discovering a lump in her breast during a self-examination while preparing the Siegel tribute episode. Roberts remained as anchor while undergoing chemotherapy and completed radiation treatments on March 28, 2008.