Sia isn't holding back about her struggles with not only addiction but her mental health as well and revealed that she relapsed following the debut of her first directorial film. 

Sia collapses under pressure

Sia was met with major backlash following her directorial debut Music after she cast Maddie Ziegler to portray a non-verbal autistic woman who turns to music. 

Jim Carrey is known for his role as "Ace Ventura" in 1994's 'Ace Ventura: Pet Detective'.

From silly to serious...

Jim Carrey's Tragic Life Story

Sia did tell Twitter that she tried to use an actual woman who was non-verbal and on the spectrum, but the actress "found it unpleasant and stressful."

But, having so much negativity surrounding her project led to a collapse in mental health, and ultimately relapse.

Watch the video above for more!