Heart of Dixie EW's Chris Willman got a sneak peek at the Dixie Chicks' sure-to-be-controversial documentary ''Shut Up and Sing,'' in which Natalie Maines calls the president a ''dumb f---'' The international press won't get their first look at the documentary Dixie Chicks: Shut Up and Sing until its gala premiere at the Toronto Film Festival tonight. But EW.com got an early look at the sure-to-be-controversial doc in Los Angeles and can attest that the film will continue to bring the (ex?) country trio more plaudits from progressives and further condemnation from conservatives. And if you think singer Natalie Maines...
