It was a rough night for the Dixie Chicks at Wednesday's Academy of Country Music Awards in Las Vegas: Besides being completely shut out for the prizes, they were booed by the crowd every time their very name was mentioned.

The reactions were part of the continued fallout from comments by Chicks lead singer Natalie Maines, who told a London audience in March that she was embarrassed President Bush was from her home state of Texas. Maines later apologized.

According to Reuters, the Texas trio did not appear in person at the ACM ceremony -- instead performing live via satellite from Austin. They received a "pretty big negative response," the show's host, Reba McEntire, 48, told reporters backstage afterward.

When presenter Vince Gill had to announce them in a list of nominees for entertainer of the year, he jokingly mumbled their names.

That top award went to Toby Keith -- who went into the night with a leading eight nominations. Entertainer of the year was his only win, though he reportedly left the event before his name was called.

Meanwhile, Alan Jackson nabbed album of the year for "Drive," which also won for its video (his 11th ACM award), while Brooks & Dunn were named top vocal duo (their 17th award, a record).

Joe Nichols picked up new male vocalist honors, thanks to his back-to-back hits, "The Impossible" and "Brokenheartedsville." Rascal Flatts won their second ACM for the song "I'm Movin' On."