The singer/actress underwent three months of treatment for a series of emotional issues, including self-harming and an eating disorder.
She announced a trio of shows earlier this month, her first since she quit her South American trek with the Jonas Brothers in 2010. And her fans proved they can't wait to see Lovato back on stage -- the three gigs sold out in less than 15 minutes.
She took to her Twitter.com page to thank fans, writing, "Wow. THANK YOU GUYS!!!!!! I have the best fans ever ever EVER!"
Lovato will play two shows at the Hammerstein Ballroom in New York on Sept. 17 and Sept. 18 and a third gig at the Nokia Theatre in Los Angeles on Sept. 23.
msn