by Corinne Heller | Wed., Jun. 27, 2018 9:23 AM
She had celebrated maintaining six years of sobriety in March. Lovato has for years been open about her battles with drug and alcohol addictions, as well as with bipolar disorder, eating disorders and self-harm, and underwent rehab at age 18 in 2010.
"To my fans, my family, and my supporters, the ones who never left me, you are my light," Lovato wrote on Instagram on Wednesday, alongside a video of her at one of her concerts. "I am forever grateful."
JO.ROBERTS / BACKGRID
Lovato is currently on the European leg of her Tell Me You Love Me world tour. On Sunday, she performed at the Rock in Rio Lisboa festival in Lisbon, Portugal. That day, she posted on Instagram a video of her performing "Sober" at the event.
"Tonight I took the stage, a new person with a new life," she wrote. "Thank you to everyone who has supported me throughout this journey. It will never be forgotten ❤️."
She is set to perform in Bologna, Italy on Wednesday evening.