The “Timber” hitmaker was at Timberline Knolls clinic near Chicago.
She now feels fit to start work on her music, reports contactmusic.com.
“Happy to be back! Feeling healthy and working on tons of new music, I can’t thank my fans enough for all the love and support you have given me,” she posted on Twitter.
“Life is beautiful. I’m so blessed to have you all,” she added.