Carrie Underwood and Miranda Lambert rock 'Something Bad' at the Billboard Music Awards 2014

billboard-music-awards-20-14-carrie-underwood-miranda-lambert.jpgCountry cuties Carrie Underwood and Miranda Lambert may have gotten their starts on reality TV singing competitions, but now they are two of the biggest stars of country music. Sunday (May 18) they took to the stage together at the 2014 Billboard Music Awards for their very first duet and it was amazing (of course).

The women performed "Something Bad," their duet that appears on Lambert's upcoming album, "Platinum," which is dropping Tuesday, June 3. Despite being friends off stage, Lambert admits to Country Weekly that she was nervous about the performance.

"I'm gonna be really nervous to sing with Carrie. It will be the first time we sing it live together. That's the fun part, though. That's kind of why you want to do it in the first place, is to sing it live," says Lambert. "I mean, it's fun to sing it in the studio and all that stuff with her, but definitely singing with someone as powerful as she is pushes you as a vocalist."

Lambert continues, "I'm excited for people to see two female country artists up there onstage together. That doesn't happen that often, or not often enough, in my opinion. So, we're just gonna go rock it."

And rock it they did. Plus later, Carrie was awarded the second annual Milestone Award, which is an honor voted on by fans.

In case you missed the performance, video below.

Photo/Video credit: Getty Images