Kesha Performs for the First Time Since Leaving Rehab—See the Pic!

Singer took the stage and sang during the annual Petty Fest in Los Angeles

This is music to our ears.

Kesha was back to doing what she does best when the "Timber" singer hit the stage at the El Rey Theatre in Los Angeles on Thursday night.

The pop star was participating in Best Fest's Petty Fest, an annual event that features the tunes of Tom Petty. It marked Kesha's first performance since completing a two-month treatment program for an eating disorder. (Not to mention, dropping the dollar sign from her name and replacing it with the letter "s.")

During the show, Kesha grabbed the mic and belted out the Petty hit "Free Fallin.'"

The 27-year-old songstress left an Illinois rehab facility on March 6 and was spotted at Los Angeles International Airport wearing a sweatshirt that read "Ima a Survivor" and sporting a colorful 'do.

Kesha tweeted a picture of herself from the plane after landing and told her Twitter followers, "Happy to be back! Feeling healthy & working on tons of new music. I can't thank my fans enough for all the love & support u have given me."

She added, "Life is beautiful. I'm so blessed to have u all."

Last Saturday, Kesha made her first red carpet appearance since leaving rehab when she attended The Humane Society of the United States' 60th Anniversary Gala at the Beverly Hilton Hotel.