Demi Lovato commended fellow actress Catherine Zeta-Jone's "brave" decision to receive treatment for a mental disorder this week.

According to PEOPLE, Lovato took to Twitter on Thursday to show support for Zeta-Jones.

"I don't know Catherine Zeta-Jones personally but what she has decided to do it SO brave," Lovato tweeted. "And SO difficult but worth it... I'm proud of her."

A rep for Zeta-Jones released a statement on Wednesday on behalf of her client. "After dealing with the stress of the past year, Catherine made the decision to check in to a mental health facility for a brief stay to treat her Bipolar II Disorder."