It's been an awfully hectic week for Lady Antebellum, who have set up camp in Los Angeles for the week. On Monday, they debuted their hot new single "Downtown" on The Tonight Show With Jay Leno, filmed an installment of CMT Crossroads with rock diva Stevie Nicks on Tuesday, and then spent the latter half of the week shooting the video for "Downtown."

"We put a funny little treatment to it. I don’t want to give it away, but it’s definitely going to be our most personality driven," Charles reveals to Country Weekly. "It’s the most acting we’ve ever had to do in a video, that’s for sure, but it’s a lot of fun."

The bouncy, sassy "Downtown" has been Lady A's highest-charting debut to date, landing at No. 25 on the Billboard country chart.

And Charles says the band has been getting a charge out of playing it live.

"We debuted it for the first time on Leno, and we walked off saying, 'Man, how fun is it to have a fun, upbeat, exciting song to perform live?' instead of a ballad or an angsty song," Charles recalls. "It’s a nice change for us."

Look for more on Lady A's "Downtown" in the Feb. 25 issue of Country Weekly, on stands Feb. 18.