She's back and better than ever!

During her first post-treatment concert in Eau Claire, Wisconsin last night, LeAnn Rimes took the time to thank her fans for their support.

"I'm totally cool and so happy; I think I'm about to cry," she said, according to People. "Thanks for being awesome fans -- patient and understanding."

The 30-year-old country singer checked herself into a treatment center in August to deal with high levels of anxiety and stress.

"LeAnn has voluntarily entered a 30 day in-treatment facility to cope with anxiety and stress," her rep Marcel Pariseau explained, as reported by People. While there will be speculation regarding her treatment, she is simply there to learn and develop coping mechanisms. While privacy isn't expected, it's certainly appreciated."

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