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We wouldn't call it a coincidence exactly, but this sure is a small world.

Minus a trip home for daughter Tallulah's 18th birthday, Demi Moore has been spending her days at Utah's Cirque Lodge, heading out to the high-price treatment center the week after a seizure-like attack landed her in the hospital.

And while Moore certainly is not alone as far as being one on a list of famous patients who have stayed at Cirque over the years, Radar is reporting that another paparazzi target is rehabbing there now, too—Brooke Mueller!

Charlie Sheen's ex has been in and out of in- and outpatient treatment over the last year. And there are only so many $30,000 programs out there. Suspend your disbelief, folks, because this story is...

MORE: Five Stars Who Rehabbed at Utah's Cirque Lodge—Before Demi Moore

So false!

"Yet another example of an unnamed source trying to bring some excitement into their otherwise boring life by making up stories about a celebrity," Mueller's rep tells E! News.

And our sources have given us no reason to doubt him, as we've heard the same thing: Mueller is not at Cirque.

The divorced mother of twins has struggled with substance-abuse issues. In December, after deciding that an outpatient program in L.A. wasn't working for her, she checked into a "long-term inpatient treatment center."

Despite Mueller's troubles, she has retained primary custody of her and Sheen's sons, who are in the care of a nanny and their grandma and get to see their daddy during visits.

—Reporting by Claudia Rosenbaum and Ken Baker

GALLERY: Charlie Sheen & Brooke Mueller: Better Days