After President Bush joked that he wanted to send the "Jessica jinx" to this summer's Democratic National Convention in Denver, there was no response from Jessica Simpson or her Dallas Cowboys quarterback beau Tony Romo (who played the worst game of his career as the singer cheered him on). But Dixie Chicks singer Natalie Maines – whose infamous comments about the president are documented in the film Shut Up and Sing – shared her advice for Simpson with Usmagazine.com : "Pick ...