LeAnn Rimes -- the woman who put on the perpetually smiley face after being the other woman in a love triangle involving a married couple -- now says she can't cope with the stress ... and has checked into a treatment center.
A rep for Rimes ... who has spent the past year habitually tweeting out bikini photos of herself ... just released a statement to People.com saying, "LeAnn has voluntarily entered a 30-day in-patient treatment facility to cope with anxiety and stress."
"While there will be speculation regarding her treatment, she is simply there to learn and develop coping mechanisms."
Rimes also issued a statement herself ... saying, "This is just a time for me to emotionally check out for a second and take care of myself and come back in 30 days as the best 30-year-old woman I can be."
"All the things in my life will be there when I get out, but you know what? I'm hoping they're not going to affect me as much ... I'll have the tools to know how to deal with them."
Checks into Rehab --
I've Got 'Emotional Issues'
8/30/2012 6:15 AM PDT BY TMZ STAFF
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