Ashton Kutcher finally touched down in LA -- two days after Demi Moore was rushed to the hospital -- looking far more concerned than he did earlier this week in Brazil.
Ashton was spotted partying hard at a Bruno Mars concert -- the day after Demi was hospitalized when she fell into convulsions at home. She was taken by ambulance to a nearby hospital ... where she's been getting treatment for substance abuse.
Demi announced her plans to divorce Ashton back in November.
The Party's Over ...
Returns to LA
1/27/2012 5:00 AM PST BY TMZ STAFF
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