Ashton Kutcher Partying in Brazil, Tweets Amid Demi’s Breakdown

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 SUPPLIED BY XPOSUREPHOTOS.COM; Jason LaVeris/FilmMagic

Estranged is right.

Demi Moore is going through some difficult times indeed following her November 2011 split from Ashton Kutcher — seeking treatment for "exhaustion" as rumors swirl about hard partying and even the alleged use of nitrous oxide.

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But Kutcher, 33, is a world away, literally and figuratively, from his estranged wife of six years.

The Two and a Half Men star has been living it up in Sao Paulo, Brazil; on Sunday, he caused chaos sitting in the front row at the Colcci show, where stunning models (including the five-months pregnant Alessandra Ambrosio) strutted their stuff on the runway.

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He and Ambrosio then shot a Colcci campaign together; when TMZ photographers caught Kutcher emerging from a Sao Paulo nightclub Tuesday (as news of his ex-wife's 911 emergency stormed the web) with a sexy blonde, he refused to comment on how Moore, 49, was doing.

And as recently as early Thursday, Kutcher was tweeting — about tech toys, not Moore.

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"Citizen journalists take to the sky," he wrote, linking to a news story about livestreaming journalists and bloggers who use "drone" cameras — toy helicopter rigged with camera equipment — to take their own aerial shots of footage around the world.

Marveled one Kutcher follower: "Surprised this is where your focus is right now."

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