Magento CONCAT EAV Attributes

gistfile1.txt

        $collection = Mage::getModel('customer/address')->getCollection();

        $collection->addAttributeToSelect('*');

        $collection->addExpressionAttributeToSelect(
            'full_address',
            "CONCAT({{firstname}}, {{lastname}}, {{street}}, {{city}}, {{postcode}})",
            array('firstname', 'lastname', 'street', 'city', 'postcode')
        );

        var_dump($collection->getFirstItem()->getData('full_address'));