From AZCentral.com: "LOS ANGELES -- Three days after Linda Ronstadt was booed in Las Vegas for putting politics in her songbook, she was cheered in Los Angeles for keeping on message.Ronstadt sang to a full-house Universal Amphitheatre on Tuesday night and the crowd reserved its longest and loudest ovation for her endorsement of filmmaker-provacateur Michael Moore and his documentary "Fahrenheit 9/11.""