NASCAR fans at the Rock the Rapids Music Festival in Michigan on Monday (Aug. 20) got a nice surprise when Miranda Lambert brought out new BFF Danica Patrick. The country star and her audience serenaded the driver, changing Roger Miller's iconic driving song to "Queen of the Road." (Watch below.)

Danica's surprise appearance at Miranda's show comes just after the release of the "Fastest Girl in Town" video, in which the pair star as a "Thelma & Louise"-type duo. "Danica was the person I thought of immediately when I envisioned the video. We had so much fun playing two bad ass chicks up to no good," Miranda says with a laugh. "Danica has a really busy schedule, and I'm thrilled she was able to take time to come to Tennessee and be a part of this."

Watch Miranda Perform With Danica Onstage