Outspoken gun-control champion Rosie O'Donnell says she's quitting as Kmart's chief pitchwoman. According to the New York Daily News, the TV talk show host says her future gun-control endeavors would make it tough for her to keep starring in commercials for the gun-selling retail giant. "It's only fair to Kmart that I stop doing commercials," said O'Donnell, who has notably sparred on-air with Tom Selleck over the issue. O'Donnell's spokeswoman, Lois Smith, added: "It was important for her to take herself out of commercials so neither she nor Kmart would be further criticized." However, Kmart insiders told the Daily News that O'Donnell was actually canned, because the company was tired of negative publicity over her gun stance.