Kelly Clarkson thrilled her fans with an impromptu karaoke show at a Nashville bar this week. Clarkson invited fans to join her by posting a message on her Twitter page:

"Okay, everyone that sees this in Nashville, meet us at Larry's Lounge asap!! Karaoke and fun times for everyone 21 and above!! Bring it!!"

Clarkson and her friends went on to sing a set of songs, including Carrie Underwood's "Before He Cheats" and Ke$sha's "Your Love is My Drug," before wrapping up her set. After the event, she thanked her fans on Twitter, exclaiming:

"And the trophy for most awesome fan at Karaoke tonight goes to DANIELLE!!!!! You're awesome and sang the heck out of 'Proud Mary' girl!!"

Clarkson will be kicking off a string of summer performances starting with the Lilith Fair tour, which will start in Denver on July 13. Others performing at Lilith include the Bangles, the Go-Go's, Martina McBride, and more.