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After checking out of a 3-month rehab program in February, Brook Mueller has been working hard on her recovery via an outpatient program, and it definitely shows! The 34-year-old looked happy and healthy as she ventured out in Westwood to pick up frozen yogurt for her twins, Max and Bob, on Tuesday afternoon.

The former Mrs. Charlie Sheen showed off a much healthier frame in a black T-shirt -- which read "Hell is so hot right now" -- paired with a leather jacket and jeans, and still rocking her newly cropped 'do.

Mueller has been focused on spending all of her time with the twins since returning home, and she's gearing up to celebrate their third birthday with daddy Sheen, on March 14.

Keep up the good work, Brooke!