Demi Lovato and Catherine Zeta-Jones
Vince Flores/AFF-USA; Dimitrios Kambouris/Getty
04/14/2011 at 05:00 PM EDT
is speaking out in support of Catherine Zeta-Jones
in the wake of the actress's revelation this week that she sought treatment
for her Bipolar II disorder.
"I don't know Catherine Zeta-Jones personally but what she has decided to do it SO brave," Lovato Tweeted
Thursday. "And SO difficult but worth it... I'm proud of her."
Lovato, 18, who has been open about her own personal struggles, entered a treatment facility
last fall for what she now calls "a nervous breakdown."
"I was really bad off," she told Seventeen
magazine, which she has joined as a contributing editor. "My parents and my manager pulled me aside and said, 'You need to get some help.' It was an intervention. I wanted freedom from the inner demons. I wanted to start my life over."