Keith Urban made a surprise visit to the CMA Music Festival (ala Jessica Simpson) this weekend.

When talking to the media, Keith mentioned all of the cool stuff fans have been sending to him and wife Nicole Kidman, who is expecting their first child together this summer.

"We got a tie-dyed jumpsuit thing that we really like," he said. Reporters informed him that is was likely a "onesie," which confused the country singer.

He added, "I'm learning a new vocabulary. We also got a tiny T-shirt that says 'I crawl the line' that we like a lot."

Keith played a full set for the crowd. Nicole was nowhere to be found in the hot Nashville weather, but Keith still had a great time and loved the crowd.

I want to say a huge thank you to everybody that has coughed up the most outrageous amount of money per gallon to get gas to come to this festival this year," he said. "We're gonna give you a show worth seven bucks a gallon, so you're making three bucks right there."

Read more at: http://socialitelife.celebuzz.com/2008/06/08/keith_urban_is_learning_baby_fashion_lingo.php.